),
			'selector' => static::ROOT_BLOCK_SELECTOR,
		);

		if ( isset( $theme_json['styles']['elements'] ) ) {
			foreach ( self::ELEMENTS as $element => $selector ) {
				if ( ! isset( $theme_json['styles']['elements'][ $element ] ) ) {
					continue;
				}
				$nodes[] = array(
					'path'     => array( 'styles', 'elements', $element ),
					'selector' => static::ELEMENTS[ $element ],
				);

				// Handle any pseudo selectors for the element.
				if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element ] ) ) {
					foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element ] as $pseudo_selector ) {

						if ( isset( $theme_json['styles']['elements'][ $element ][ $pseudo_selector ] ) ) {
							$nodes[] = array(
								'path'     => array( 'styles', 'elements', $element ),
								'selector' => static::append_to_selector( static::ELEMENTS[ $element ], $pseudo_selector ),
							);
						}
					}
				}
			}
		}

		// Blocks.
		if ( ! isset( $theme_json['styles']['blocks'] ) ) {
			return $nodes;
		}

		$block_nodes = static::get_block_nodes( $theme_json, $selectors, $options );
		foreach ( $block_nodes as $block_node ) {
			$nodes[] = $block_node;
		}

		/**
		 * Filters the list of style nodes with metadata.
		 *
		 * This allows for things like loading block CSS independently.
		 *
		 * @since 6.1.0
		 *
		 * @param array $nodes Style nodes with metadata.
		 */
		return apply_filters( 'wp_theme_json_get_style_nodes', $nodes );
	}

	/**
	 * A public helper to get the block nodes from a theme.json file.
	 *
	 * @since 6.1.0
	 *
	 * @return array The block nodes in theme.json.
	 */
	public function get_styles_block_nodes() {
		return static::get_block_nodes( $this->theme_json );
	}

	/**
	 * Returns a filtered declarations array if there is a separator block with only a background
	 * style defined in theme.json by adding a color attribute to reflect the changes in the front.
	 *
	 * @since 6.1.1
	 *
	 * @param array $declarations List of declarations.
	 * @return array $declarations List of declarations filtered.
	 */
	private static function update_separator_declarations( $declarations ) {
		$background_color     = '';
		$border_color_matches = false;
		$text_color_matches   = false;

		foreach ( $declarations as $declaration ) {
			if ( 'background-color' === $declaration['name'] && ! $background_color && isset( $declaration['value'] ) ) {
				$background_color = $declaration['value'];
			} elseif ( 'border-color' === $declaration['name'] ) {
				$border_color_matches = true;
			} elseif ( 'color' === $declaration['name'] ) {
				$text_color_matches = true;
			}

			if ( $background_color && $border_color_matches && $text_color_matches ) {
				break;
			}
		}

		if ( $background_color && ! $border_color_matches && ! $text_color_matches ) {
			$declarations[] = array(
				'name'  => 'color',
				'value' => $background_color,
			);
		}

		return $declarations;
	}

	/**
	 * Updates the text indent selector for paragraph blocks based on the textIndent setting.
	 *
	 * The textIndent setting can be 'subsequent' (default), 'all', or false.
	 * When set to 'all', the selector should be '.wp-block-paragraph' instead of
	 * '.wp-block-paragraph + .wp-block-paragraph' to apply indent to all paragraphs.
	 *
	 * @since 7.0.0
	 *
	 * @param array  $feature_declarations The feature declarations keyed by selector.
	 * @param array  $settings             The theme.json settings.
	 * @param string $block_name           The block name being processed.
	 * @return array The updated feature declarations.
	 */
	private static function update_paragraph_text_indent_selector( $feature_declarations, $settings, $block_name ) {
		if ( 'core/paragraph' !== $block_name ) {
			return $feature_declarations;
		}

		// Check block-level settings first, then fall back to global settings.
		$block_settings      = $settings['blocks']['core/paragraph'] ?? null;
		$text_indent_setting = $block_settings['typography']['textIndent']
			?? $settings['typography']['textIndent']
			?? 'subsequent';

		if ( 'all' !== $text_indent_setting ) {
			return $feature_declarations;
		}

		// Look for the text indent selector and replace it.
		$old_selector = '.wp-block-paragraph + .wp-block-paragraph';
		$new_selector = '.wp-block-paragraph';

		if ( isset( $feature_declarations[ $old_selector ] ) ) {
			$declarations = $feature_declarations[ $old_selector ];
			unset( $feature_declarations[ $old_selector ] );
			$feature_declarations[ $new_selector ] = $declarations;
		}

		return $feature_declarations;
	}

	/**
	 * Updates button width declarations to use a calc() formula for percentage values.
	 *
	 * When a percentage width is set on the Button block via Global Styles, the
	 * resulting CSS needs to account for block gap spacing so that buttons tile
	 * correctly on a row (e.g. 4 buttons at 25% width all fit on one row).
	 *
	 * This mirrors the dynamic calc() formula applied at the block instance level
	 * in the button block's stylesheet (style.scss).
	 *
	 * @since 7.1.0
	 *
	 * @param array $feature_declarations The feature declarations keyed by selector.
	 * @param array $settings             The theme.json settings.
	 * @return array The updated feature declarations.
	 */
	private static function update_button_width_declarations( $feature_declarations, $settings ) {
		if ( ! isset( $feature_declarations['.wp-block-button'] ) ) {
			return $feature_declarations;
		}

		foreach ( $feature_declarations['.wp-block-button'] as &$declaration ) {
			if ( 'width' !== $declaration['name'] || ! isset( $declaration['value'] ) ) {
				continue;
			}

			$value      = $declaration['value'];
			$percentage = null;

			// Case 1: Direct percentage value e.g. "25%".
			if ( is_string( $value ) && str_ends_with( $value, '%' ) ) {
				$percentage = (float) $value;
			}

			// Case 2: Preset CSS var e.g. "var(--wp--preset--dimension--50)".
			if ( null === $percentage && is_string( $value ) && str_starts_with( $value, 'var(--wp--preset--dimension--' ) ) {
				// Extract the slug from the var name.
				$slug = substr( $value, strlen( 'var(--wp--preset--dimension--' ), -1 );

				/*
				 * Look up the preset size across all origins.
				 * Check block-level settings first (core/button), then top-level settings.
				 */
				$dimension_sizes = ( $settings['blocks']['core/button']['dimensions']['dimensionSizes'] ?? array() )
					+ ( $settings['dimensions']['dimensionSizes'] ?? array() );
				foreach ( $dimension_sizes as $origin_sizes ) {
					if ( ! is_array( $origin_sizes ) ) {
						continue;
					}
					foreach ( $origin_sizes as $preset ) {
						if ( isset( $preset['slug'] ) && $slug === $preset['slug'] && isset( $preset['size'] ) ) {
							$size = $preset['size'];
							if ( is_string( $size ) && str_ends_with( $size, '%' ) ) {
								$percentage = (float) $size;
							}
							break 2;
						}
					}
				}
			}

			if ( null === $percentage ) {
				continue;
			}

			/*
			 * Apply the same calc() formula as the block instance level (style.scss).
			 * The numeric percentage value is used as a unitless number:
			 * - Multiplied by 1% to get the percentage width.
			 * - Divided by 100 to calculate the gap adjustment proportion.
			 */
			$declaration['value'] = sprintf(
				'calc(%s * 1%% - (var(--wp--style--block-gap, 0.5em) * (1 - %s / 100)))',
				$percentage,
				$percentage
			);
		}
		unset( $declaration );

		return $feature_declarations;
	}

	/**
	 * An internal method to get the block nodes from a theme.json file.
	 *
	 * @since 6.1.0
	 * @since 6.3.0 Refactored and stabilized selectors API.
	 * @since 6.6.0 Added optional selectors and options for generating block nodes.
	 * @since 6.7.0 Added $include_node_paths_only option.
	 * @since 7.1.0 Added responsive block nodes for breakpoint-based styles.
	 *
	 * @param array $theme_json The theme.json converted to an array.
	 * @param array $selectors  Optional list of selectors per block.
	 * @param array $options {
	 *     Optional. An array of options for now used for internal purposes only (may change without notice).
	 *
	 *     @type bool $include_block_style_variations Include nodes for block style variations. Default false.
	 *     @type bool $include_node_paths_only        Return only block nodes node paths. Default false.
	 * }
	 * @return array The block nodes in theme.json.
	 */
	private static function get_block_nodes( $theme_json, $selectors = array(), $options = array() ) {
		$nodes = array();

		if ( ! isset( $theme_json['styles']['blocks'] ) ) {
			return $nodes;
		}

		$include_variations       = $options['include_block_style_variations'] ?? false;
		$include_node_paths_only  = $options['include_node_paths_only'] ?? false;
		$responsive_media_queries = static::get_viewport_media_queries( $theme_json['settings']['viewport'] ?? null );

		// If only node paths are to be returned, skip selector assignment.
		if ( ! $include_node_paths_only ) {
			$selectors = empty( $selectors ) ? static::get_blocks_metadata() : $selectors;
		}

		foreach ( $theme_json['styles']['blocks'] as $name => $node ) {
			$node_path = array( 'styles', 'blocks', $name );
			if ( $include_node_paths_only ) {
				$variation_paths = array();
				if ( $include_variations && isset( $node['variations'] ) ) {
					foreach ( $node['variations'] as $variation => $variation_node ) {
						$variation_paths[] = array(
							'path' => array( 'styles', 'blocks', $name, 'variations', $variation ),
						);
					}
				}
				$node = array(
					'path' => $node_path,
				);
				if ( ! empty( $variation_paths ) ) {
					$node['variations'] = $variation_paths;
				}
				$nodes[] = $node;
			} else {
				$selector = null;
				if ( isset( $selectors[ $name ]['selector'] ) ) {
					$selector = $selectors[ $name ]['selector'];
				}

				$duotone_selector = null;
				if ( isset( $selectors[ $name ]['duotone'] ) ) {
					$duotone_selector = $selectors[ $name ]['duotone'];
				}

				$feature_selectors = null;
				if ( isset( $selectors[ $name ]['selectors'] ) ) {
					$feature_selectors = $selectors[ $name ]['selectors'];
				}

				$variation_selectors = array();

				if ( $include_variations && isset( $node['variations'] ) ) {
					foreach ( $node['variations'] as $variation => $node ) {
						$variation_selectors[] = array(
							'name'     => $variation,
							'path'     => array( 'styles', 'blocks', $name, 'variations', $variation ),
							'selector' => $selectors[ $name ]['styleVariations'][ $variation ],
						);
					}
				}

				$nodes[] = array(
					'name'       => $name,
					'path'       => $node_path,
					'selector'   => $selector,
					'selectors'  => $feature_selectors,
					'elements'   => $selectors[ $name ]['elements'] ?? array(),
					'duotone'    => $duotone_selector,
					'variations' => $variation_selectors,
					'css'        => $selector,
				);

				// Responsive block nodes: emit one node per breakpoint that has styles.
				// These are rendered immediately after the base block node so that
				// the cascade order is: .block{} → @media{.block{}}
				foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
					if ( isset( $theme_json['styles']['blocks'][ $name ][ $breakpoint ] ) ) {
						$nodes[] = array(
							'name'        => $name,
							'path'        => array( 'styles', 'blocks', $name, $breakpoint ),
							'media_query' => $responsive_media_queries[ $breakpoint ],
							'selector'    => $selector,
							'selectors'   => $feature_selectors,
							'elements'    => $selectors[ $name ]['elements'] ?? array(),
							'variations'  => $variation_selectors,
							'css'         => $selector,
						);
					}
				}

				// Handle any pseudo selectors for the block.
				if ( isset( static::VALID_BLOCK_PSEUDO_SELECTORS[ $name ] ) ) {
					foreach ( static::VALID_BLOCK_PSEUDO_SELECTORS[ $name ] as $pseudo_selector ) {
						$has_pseudo            = isset( $theme_json['styles']['blocks'][ $name ][ $pseudo_selector ] );
						$has_responsive_pseudo = false;
						foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
							if ( isset( $theme_json['styles']['blocks'][ $name ][ $breakpoint ][ $pseudo_selector ] ) ) {
								$has_responsive_pseudo = true;
								break;
							}
						}

						if ( ! $has_pseudo && ! $has_responsive_pseudo ) {
							continue;
						}

						/*
						 * Append the pseudo-selector to each feature selector so that
						 * get_feature_declarations_for_node generates CSS scoped to the
						 * pseudo-state (e.g. '.wp-block-button:hover') rather than the
						 * default state (e.g. '.wp-block-button').
						 */
						$pseudo_feature_selectors = array();
						foreach ( $feature_selectors ?? array() as $feature => $feature_selector ) {
							if ( is_array( $feature_selector ) ) {
								$pseudo_feature_selectors[ $feature ] = array();
								foreach ( $feature_selector as $subfeature => $subfeature_selector ) {
									$pseudo_feature_selectors[ $feature ][ $subfeature ] = static::append_to_selector( $subfeature_selector, $pseudo_selector );
								}
							} else {
								$pseudo_feature_selectors[ $feature ] = static::append_to_selector( $feature_selector, $pseudo_selector );
							}
						}

						if ( $has_pseudo ) {
							$nodes[] = array(
								'name'       => $name,
								'path'       => array( 'styles', 'blocks', $name, $pseudo_selector ),
								'selector'   => static::append_to_selector( $selector, $pseudo_selector ),
								'selectors'  => $pseudo_feature_selectors,
								'elements'   => $selectors[ $name ]['elements'] ?? array(),
								'duotone'    => $duotone_selector,
								'variations' => $variation_selectors,
								'css'        => static::append_to_selector( $selector, $pseudo_selector ),
							);
						}

						// Responsive pseudo nodes: emit one node per breakpoint that has
						// this pseudo state, immediately after the default pseudo node.
						// Cascade order: .block:hover{} → @media{.block:hover{}}
						foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
							if ( isset( $theme_json['styles']['blocks'][ $name ][ $breakpoint ][ $pseudo_selector ] ) ) {
								$nodes[] = array(
									'name'        => $name,
									'path'        => array( 'styles', 'blocks', $name, $breakpoint, $pseudo_selector ),
									'media_query' => $responsive_media_queries[ $breakpoint ],
									'selector'    => static::append_to_selector( $selector, $pseudo_selector ),
									'selectors'   => $pseudo_feature_selectors,
									'elements'    => $selectors[ $name ]['elements'] ?? array(),
									'variations'  => $variation_selectors,
									'css'         => static::append_to_selector( $selector, $pseudo_selector ),
								);
							}
						}
					}
				}

				// Handle custom states (e.g. '-current' for navigation).
				if ( isset( static::VALID_BLOCK_CUSTOM_STATES[ $name ] ) ) {
					foreach ( static::VALID_BLOCK_CUSTOM_STATES[ $name ] as $custom_state ) {
						if (
							isset( $theme_json['styles']['blocks'][ $name ][ $custom_state ] ) &&
							isset( $selectors[ $name ]['states'][ $custom_state ] )
						) {
							$custom_css_selector = $selectors[ $name ]['states'][ $custom_state ];
							$nodes[]             = array(
								'name'       => $name,
								'path'       => array( 'styles', 'blocks', $name, $custom_state ),
								'selector'   => $custom_css_selector,
								'selectors'  => $feature_selectors,
								'elements'   => $selectors[ $name ]['elements'] ?? array(),
								'duotone'    => $duotone_selector,
								'variations' => $variation_selectors,
								'css'        => $custom_css_selector,
							);

							// Sub-pseudo-selectors within the custom state.
							if ( isset( static::VALID_BLOCK_PSEUDO_SELECTORS[ $name ] ) ) {
								foreach ( static::VALID_BLOCK_PSEUDO_SELECTORS[ $name ] as $pseudo ) {
									if ( isset( $theme_json['styles']['blocks'][ $name ][ $custom_state ][ $pseudo ] ) ) {
										$compound_css_selector = static::append_to_selector( $custom_css_selector, $pseudo );
										$nodes[]               = array(
											'name'       => $name,
											'path'       => array( 'styles', 'blocks', $name, $custom_state, $pseudo ),
											'selector'   => $compound_css_selector,
											'selectors'  => $feature_selectors,
											'elements'   => $selectors[ $name ]['elements'] ?? array(),
											'duotone'    => $duotone_selector,
											'variations' => $variation_selectors,
											'css'        => $compound_css_selector,
										);
									}
								}
							}
						}
					}
				}
			}
			/*
			 * Elements can be styled outside any breakpoint, inside one, or both,
			 * so collect the names from all of those places before looping. An
			 * element styled only inside a breakpoint still needs a node.
			 */
			$block_node    = $theme_json['styles']['blocks'][ $name ] ?? array();
			$element_names = array_keys( $block_node['elements'] ?? array() );
			foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
				$element_names = array_merge(
					$element_names,
					array_keys( $block_node[ $breakpoint ]['elements'] ?? array() )
				);
			}
			$element_names = array_unique( $element_names );

			if ( ! empty( $element_names ) ) {
				foreach ( $element_names as $element ) {
					$element_path = array( 'styles', 'blocks', $name, 'elements', $element );
					if ( $include_node_paths_only ) {
						if ( isset( $block_node['elements'][ $element ] ) ) {
							$nodes[] = array(
								'path' => $element_path,
							);
						}
						continue;
					}

					if ( ! isset( $selectors[ $name ]['elements'][ $element ] ) ) {
						continue;
					}

					$element_selector = $selectors[ $name ]['elements'][ $element ];

					if ( isset( $block_node['elements'][ $element ] ) ) {
						$nodes[] = array(
							'path'     => $element_path,
							'selector' => $element_selector,
						);
					}

					// Responsive element nodes: one node per breakpoint that has
					// styles for this element. Cascade: a{} → @media{a{}}
					foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
						if ( isset( $theme_json['styles']['blocks'][ $name ][ $breakpoint ]['elements'][ $element ] ) ) {
							$nodes[] = array(
								'path'        => array( 'styles', 'blocks', $name, $breakpoint, 'elements', $element ),
								'selector'    => $element_selector,
								'media_query' => $responsive_media_queries[ $breakpoint ],
							);
						}
					}

					// Handle any pseudo selectors for the element.
					if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element ] ) ) {
						foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element ] as $pseudo_selector ) {
							// Emit the default pseudo node only when the default state styles
							// the pseudo. Otherwise get_styles_for_block() falls back to the
							// element's base styles, outputting a rule the theme never defined.
							if ( isset( $theme_json['styles']['blocks'][ $name ]['elements'][ $element ][ $pseudo_selector ] ) ) {
								$nodes[] = array(
									'path'     => array( 'styles', 'blocks', $name, 'elements', $element ),
									'selector' => static::append_to_selector( $element_selector, $pseudo_selector ),
								);
							}

							// Responsive element pseudo nodes: one node per breakpoint
							// that has this pseudo state for this element.
							// Cascade: a:hover{} → @media{a:hover{}}
							foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
								if ( isset( $theme_json['styles']['blocks'][ $name ][ $breakpoint ]['elements'][ $element ][ $pseudo_selector ] ) ) {
									$nodes[] = array(
										'path'        => array( 'styles', 'blocks', $name, $breakpoint, 'elements', $element ),
										'selector'    => static::append_to_selector( $element_selector, $pseudo_selector ),
										'media_query' => $responsive_media_queries[ $breakpoint ],
									);
								}
							}
						}
					}
				}
			}
		}

		return $nodes;
	}

	/**
	 * Gets the CSS rules for a particular block from theme.json.
	 *
	 * @since 6.1.0
	 * @since 6.6.0 Setting a min-height of HTML when root styles have a background gradient or image.
	 *              Updated general global styles specificity to 0-1-0.
	 *              Fixed custom CSS output in block style variations.
	 *
	 * @param array $block_metadata Metadata about the block to get styles for.
	 * @return string Styles for the block.
	 */
	public function get_styles_for_block( $block_metadata ) {
		$node                     = _wp_array_get( $this->theme_json, $block_metadata['path'], array() );
		$use_root_padding         = isset( $this->theme_json['settings']['useRootPaddingAwareAlignments'] ) && true === $this->theme_json['settings']['useRootPaddingAwareAlignments'];
		$selector                 = $block_metadata['selector'];
		$settings                 = $this->theme_json['settings'] ?? array();
		$feature_declarations     = static::get_feature_declarations_for_node( $block_metadata, $node );
		$is_root_selector         = static::ROOT_BLOCK_SELECTOR === $selector;
		$media_query              = $block_metadata['media_query'] ?? null;
		$responsive_media_queries = static::get_viewport_media_queries( $settings['viewport'] ?? null );

		// Update text indent selector for paragraph blocks based on the textIndent setting.
		$block_name           = $block_metadata['name'] ?? null;
		$feature_declarations = static::update_paragraph_text_indent_selector( $feature_declarations, $settings, $block_name );
		$block_elements       = $block_metadata['elements'] ?? array();

		// Update button width declarations for percentage values to use calc() with block gap.
		$feature_declarations = static::update_button_width_declarations( $feature_declarations, $settings );

		// If there are style variations, generate the declarations for them, including any feature selectors the block may have.
		$style_variation_declarations          = array();
		$style_variation_custom_css            = array();
		$style_variation_responsive_css        = array();
		$style_variation_responsive_pseudo_css = array();
		$style_variation_layout_metadata       = array();
		if ( ! $media_query && ! empty( $block_metadata['variations'] ) ) {
			foreach ( $block_metadata['variations'] as $style_variation ) {
				$style_variation_node = _wp_array_get( $this->theme_json, $style_variation['path'], array() );

				// Generate any feature/subfeature style declarations for the current style variation.
				$variation_declarations = static::get_feature_declarations_for_node( $block_metadata, $style_variation_node );

				// Update text indent selector for paragraph blocks based on the textIndent setting.
				$variation_declarations = static::update_paragraph_text_indent_selector( $variation_declarations, $settings, $block_name );

				// Update button width declarations for percentage values to use calc() with block gap.
				$variation_declarations = static::update_button_width_declarations( $variation_declarations, $settings );

				// Combine selectors with style variation's selector and add to overall style variation declarations.
				foreach ( $variation_declarations as $current_selector => $new_declarations ) {
					$combined_selectors = static::get_block_style_variation_feature_selector( $style_variation, $current_selector );

					// Add the new declarations to the overall results under the modified selector.
					$style_variation_declarations[ $combined_selectors ] = $new_declarations;
				}

				// Compute declarations for remaining styles not covered by feature level selectors.
				$style_variation_declarations[ $style_variation['selector'] ] = static::compute_style_properties( $style_variation_node, $settings, null, $this->theme_json );

				// Process pseudo-selectors for this variation (e.g., :hover, :focus)
				if ( isset( $block_metadata['name'] ) ) {
					$block_name = $block_metadata['name'];
				} elseif ( in_array( 'blocks', $block_metadata['path'], true ) && count( $block_metadata['path'] ) >= 3 ) {
					$block_name = static::get_block_name_from_metadata_path( $block_metadata );
				} else {
					$block_name = null;
				}
				$variation_pseudo_declarations = $this->process_pseudo_selectors( $style_variation_node, $style_variation['selector'], $settings, $block_name, $block_metadata, $style_variation );
				$style_variation_declarations  = array_merge( $style_variation_declarations, $variation_pseudo_declarations );

				// Store custom CSS for the style variation.
				if ( isset( $style_variation_node['css'] ) ) {
					$style_variation_custom_css[ $style_variation['selector'] ] = $this->process_blocks_custom_css( $style_variation_node['css'], $style_variation['selector'] );
				}

				// Store variation metadata and node for layout styles generation.
				// Only store if the variation has blockGap defined.
				if ( isset( $style_variation_node['spacing']['blockGap'] ) ) {
					// Append block selector to the variation selector for proper targeting.
					$variation_metadata_with_selector             = $style_variation;
					$variation_metadata_with_selector['selector'] = $style_variation['selector'] . $block_metadata['css'];

					/*
					 * `get_layout_styles()` reads `name` as a block name, to check that the block
					 * supports layout at all. A variation node's `name` is the variation slug,
					 * which is never a registered block, so the check fails and every variation
					 * gap rule is discarded. Pass the block the variation belongs to, so the
					 * support check answers the question it is actually asking.
					 */
					$variation_metadata_with_selector['name'] = $block_name;

					$style_variation_layout_metadata[ $style_variation['selector'] ] = array(
						'metadata' => $variation_metadata_with_selector,
						'node'     => $style_variation_node,
					);
				}

				// Store responsive breakpoint CSS for the style variation.
				// This includes both base properties and feature-level selectors.
				$variation_responsive_css        = '';
				$variation_responsive_pseudo_css = '';

				foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
					if ( ! isset( $style_variation_node[ $breakpoint ] ) ) {
						continue;
					}

					$breakpoint_node  = $style_variation_node[ $breakpoint ];
					$breakpoint_media = $responsive_media_queries[ $breakpoint ];
					// Process feature-level declarations for this breakpoint.
					$breakpoint_feature_declarations = static::get_feature_declarations_for_node( $block_metadata, $breakpoint_node );
					$breakpoint_feature_declarations = static::update_paragraph_text_indent_selector( $breakpoint_feature_declarations, $settings, $block_name );
					$breakpoint_feature_declarations = static::update_button_width_declarations( $breakpoint_feature_declarations, $settings );
					foreach ( $breakpoint_feature_declarations as $feature_selector => $feature_decl ) {
						$combined_selectors = static::get_block_style_variation_feature_selector( $style_variation, $feature_selector );

						$feature_ruleset           = static::to_ruleset( ':root :where(' . $combined_selectors . ')', $feature_decl );
						$variation_responsive_css .= $breakpoint_media . '{' . $feature_ruleset . '}';
					}

					// Process base properties for this breakpoint.
					$breakpoint_declarations = static::compute_style_properties( $breakpoint_node, $settings, null, $this->theme_json );
					if ( ! empty( $breakpoint_declarations ) ) {
						$base_ruleset              = static::to_ruleset( ':root :where(' . $style_variation['selector'] . ')', $breakpoint_declarations );
						$variation_responsive_css .= $breakpoint_media . '{' . $base_ruleset . '}';
					}

					$breakpoint_pseudo_declarations = $this->process_pseudo_selectors( $breakpoint_node, $style_variation['selector'], $settings, $block_name, $block_metadata, $style_variation );
					foreach ( $breakpoint_pseudo_declarations as $pseudo_selector => $pseudo_declarations ) {
						if ( empty( $pseudo_declarations ) ) {
							continue;
						}
						$pseudo_ruleset                   = static::to_ruleset( ':root :where(' . $pseudo_selector . ')', $pseudo_declarations );
						$variation_responsive_pseudo_css .= $breakpoint_media . '{' . $pseudo_ruleset . '}';
					}

					// Process custom CSS for this breakpoint.
					if ( isset( $breakpoint_node['css'] ) ) {
						$breakpoint_custom_css     = static::process_blocks_custom_css( $breakpoint_node['css'], $style_variation['selector'] );
						$variation_responsive_css .= $breakpoint_media . '{' . $breakpoint_custom_css . '}';
					}

					// Process blockGap responsive layout styles for this variation.
					if ( isset( $breakpoint_node['spacing']['blockGap'] ) ) {
						$variation_layout_metadata             = $style_variation;
						$variation_layout_metadata['selector'] = $style_variation['selector'] . $block_metadata['css'];

						// The variation slug is not a block name here either. See above.
						$variation_layout_metadata['name'] = $block_name;

						$variation_responsive_css .= $this->get_layout_styles(
							$variation_layout_metadata,
							array(
								'node'        => $breakpoint_node,
								'media_query' => $breakpoint_media,
							)
						);
					}

					// Process nested element styles for this breakpoint state.
					if ( isset( $breakpoint_node['elements'] ) && ! empty( $block_elements ) ) {
						foreach ( $breakpoint_node['elements'] as $element_name => $element_node ) {
							if ( ! isset( $block_elements[ $element_name ] ) ) {
								continue;
							}

							$variation_element_selector = static::get_block_style_variation_feature_selector( $style_variation, $block_elements[ $element_name ] );

							$element_declarations = static::compute_style_properties( $element_node, $settings, null, $this->theme_json );
							if ( ! empty( $element_declarations ) ) {
								$element_ruleset           = static::to_ruleset( ':root :where(' . $variation_element_selector . ')', $element_declarations );
								$variation_responsive_css .= $breakpoint_media . '{' . $element_ruleset . '}';
							}

							if ( isset( $element_node['css'] ) ) {
								$element_custom_css        = static::process_blocks_custom_css( $element_node['css'], $variation_element_selector );
								$variation_responsive_css .= $breakpoint_media . '{' . $element_custom_css . '}';
							}

							if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] ) ) {
								foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] as $pseudo_selector ) {
									if ( ! isset( $element_node[ $pseudo_selector ] ) ) {
										continue;
									}

									$pseudo_declarations = static::compute_style_properties( $element_node[ $pseudo_selector ], $settings, null, $this->theme_json );
									if ( empty( $pseudo_declarations ) ) {
										continue;
									}

									$pseudo_selector_ruleset          = static::to_ruleset( ':root :where(' . static::append_to_selector( $variation_element_selector, $pseudo_selector ) . ')', $pseudo_declarations );
									$variation_responsive_pseudo_css .= $breakpoint_media . '{' . $pseudo_selector_ruleset . '}';
								}
							}
						}
					}
				}

				if ( ! empty( $variation_responsive_css ) ) {
					$style_variation_responsive_css[ $style_variation['selector'] ] = $variation_responsive_css;
				}
				if ( ! empty( $variation_responsive_pseudo_css ) ) {
					$style_variation_responsive_pseudo_css[ $style_variation['selector'] ] = $variation_responsive_pseudo_css;
				}
			}
		}
		/*
		 * Get a reference to element name from path.
		 * $block_metadata['path'] = array( 'styles','elements','link' );
		 * Make sure that $block_metadata['path'] describes an element node, like [ 'styles', 'element', 'link' ].
		 * Skip non-element paths like just ['styles'].
		 */
		$is_processing_element = in_array( 'elements', $block_metadata['path'], true );

		$current_element = $is_processing_element ? array_last( $block_metadata['path'] ) : null;

		$element_pseudo_allowed = array();

		if ( isset( $current_element, static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] ) ) {
			$element_pseudo_allowed = static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ];
		}

		/*
		 * Check for allowed pseudo classes (e.g. ":hover") from the $selector ("a:hover").
		 * This also resets the array keys.
		 */
		$pseudo_matches = array_values(
			array_filter(
				$element_pseudo_allowed,
				static function ( $pseudo_selector ) use ( $selector ) {
					/*
					 * Check if the pseudo selector is in the current selector,
					 * ensuring it is not followed by a dash (e.g., :focus should not match :focus-visible).
					 */
					return preg_match( '/' . preg_quote( $pseudo_selector, '/' ) . '(?!-)/', $selector ) === 1;
				}
			)
		);

		$pseudo_selector = $pseudo_matches[0] ?? null;

		/*
		 * If the current selector is a pseudo selector that's defined in the allow list for the current
		 * element then compute the style properties for it.
		 * Otherwise just compute the styles for the default selector as normal.
		 */
		if ( $pseudo_selector && isset( $node[ $pseudo_selector ] ) &&
			isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] )
			&& in_array( $pseudo_selector, static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ], true )
		) {
			$declarations = static::compute_style_properties( $node[ $pseudo_selector ], $settings, null, $this->theme_json, $selector, $use_root_padding );
		} else {
			/*
			 * For block pseudo-selector nodes (e.g. ':hover'), $node has already had any
			 * feature-selector properties (e.g. writingMode) removed by get_feature_declarations_for_node,
			 * so those properties are not output twice.
			 */
			$declarations = static::compute_style_properties( $node, $settings, null, $this->theme_json, $selector, $use_root_padding );
		}

		$block_rules = '';

		/*
		 * 1. Bespoke declaration modifiers:
		 * - 'filter': Separate the declarations that use the general selector
		 * from the ones using the duotone selector.
		 * - 'background|background-image': set the html min-height to 100%
		 * to ensure the background covers the entire viewport.
		 */
		$declarations_duotone       = array();
		$should_set_root_min_height = false;

		foreach ( $declarations as $index => $declaration ) {
			if ( 'filter' === $declaration['name'] ) {
				/*
				 * 'unset' filters happen when a filter is unset
				 * in the site-editor UI. Because the 'unset' value
				 * in the user origin overrides the value in the
				 * theme origin, we can skip rendering anything
				 * here as no filter needs to be applied anymore.
				 * So only add declarations to with values other
				 * than 'unset'.
				 */
				if ( 'unset' !== $declaration['value'] ) {
					$declarations_duotone[] = $declaration;
				}
				unset( $declarations[ $index ] );
			}

			if ( $is_root_selector && ( 'background-image' === $declaration['name'] || 'background' === $declaration['name'] ) ) {
				$should_set_root_min_height = true;
			}
		}

		/*
		 * If root styles has a background-image or a background (gradient) set,
		 * set the min-height to '100%'. Minus `--wp-admin--admin-bar--height` for logged-in view.
		 * Setting the CSS rule on the HTML tag ensures background gradients and images behave similarly,
		 * and matches the behavior of the site editor.
		 */
		if ( $should_set_root_min_height ) {
			$block_rules .= static::to_ruleset(
				'html',
				array(
					array(
						'name'  => 'min-height',
						'value' => 'calc(100% - var(--wp-admin--admin-bar--height, 0px))',
					),
				)
			);
		}

		// Update declarations if there are separators with only background color defined.
		if ( '.wp-block-separator' === $selector ) {
			$declarations = static::update_separator_declarations( $declarations );
		}

		/*
		 * Root selector (body) styles should not be wrapped in `:root where()` to keep
		 * specificity at (0,0,1) and maintain backwards compatibility.
		 *
		 * Top-level element styles using element-only specificity selectors should
		 * not get wrapped in `:root :where()` to maintain backwards compatibility.
		 *
		 * Pseudo classes, e.g. :hover, :focus etc., are a class-level selector so
		 * still need to be wrapped in `:root :where` to cap specificity for nested
		 * variations etc. Pseudo selectors won't match the ELEMENTS selector exactly.
		 */
		$element_only_selector = $is_root_selector || (
			$current_element &&
			isset( static::ELEMENTS[ $current_element ] ) &&
			// buttons, captions etc. still need `:root :where()` as they are class based selectors.
			! isset( static::__EXPERIMENTAL_ELEMENT_CLASS_NAMES[ $current_element ] ) &&
			static::ELEMENTS[ $current_element ] === $selector
		);

		// 2. Generate and append the rules that use the general selector.
		$general_selector = $element_only_selector ? $selector : ":root :where($selector)";
		$block_rules     .= static::to_ruleset( $general_selector, $declarations );

		// 3. Generate and append the rules that use the duotone selector.
		if ( isset( $block_metadata['duotone'] ) && ! empty( $declarations_duotone ) ) {
			$block_rules .= static::to_ruleset( $block_metadata['duotone'], $declarations_duotone );
		}

		// 4. Generate Layout block gap styles.
		if (
			! $is_root_selector &&
			! empty( $block_metadata['name'] )
		) {
			$block_rules .= $this->get_layout_styles( $block_metadata );
		}

		// 5. Generate and append the feature level rulesets.
		foreach ( $feature_declarations as $feature_selector => $individual_feature_declarations ) {
			$block_rules .= static::to_ruleset( ":root :where($feature_selector)", $individual_feature_declarations );
		}

		// 6. Generate and append the style variation rulesets.
		foreach ( $style_variation_declarations as $style_variation_selector => $individual_style_variation_declarations ) {
			$block_rules .= static::to_ruleset( ":root :where($style_variation_selector)", $individual_style_variation_declarations );
			if ( isset( $style_variation_layout_metadata[ $style_variation_selector ] ) ) {
				$variation_data = $style_variation_layout_metadata[ $style_variation_selector ];
				$block_rules   .= $this->get_layout_styles( $variation_data['metadata'], array( 'node' => $variation_data['node'] ) );
			}
			if ( isset( $style_variation_custom_css[ $style_variation_selector ] ) ) {
				$block_rules .= $style_variation_custom_css[ $style_variation_selector ];
			}
			if ( isset( $style_variation_responsive_css[ $style_variation_selector ] ) ) {
				$block_rules .= $style_variation_responsive_css[ $style_variation_selector ];
			}
		}
		/*
		 * Responsive pseudo styles must be output after default pseudo styles
		 * so viewport state styles win in the cascade.
		 */
		foreach ( $style_variation_responsive_pseudo_css as $responsive_pseudo_css ) {
			$block_rules .= $responsive_pseudo_css;
		}

		// 7. Generate and append any custom CSS rules.
		if ( isset( $node['css'] ) && ! $is_root_selector ) {
			$css_feature_selector = $block_metadata['selectors']['css'] ?? null;
			if ( is_array( $css_feature_selector ) ) {
				$css_feature_selector = $css_feature_selector['root'] ?? null;
			}
			$css_selector = is_string( $css_feature_selector ) ? $css_feature_selector : $selector;
			$block_rules .= $this->process_blocks_custom_css( $node['css'], $css_selector );
		}

		// 8. Wrap the entire block output in a media query if this is a responsive node.
		// Responsive nodes are created by get_block_nodes() for each breakpoint and carry
		// a 'media_query' key.
		if ( $media_query && ! empty( $block_rules ) ) {
			$block_rules = $media_query . '{' . $block_rules . '}';
		}

		return $block_rules;
	}

	/**
	 * Outputs the CSS for layout rules on the root.
	 *
	 * @since 6.1.0
	 * @since 6.6.0 Use `ROOT_CSS_PROPERTIES_SELECTOR` for CSS custom properties and improved consistency of root padding rules.
	 *              Updated specificity of body margin reset and first/last child selectors.
	 * @since 7.0.0 Added `$options` parameter to control alignment styles output for classic themes.
	 *
	 * @param string $selector The root node selector.
	 * @param array  $block_metadata The metadata for the root block.
	 * @param array  $options        Optional. An array of options for now used for internal purposes only.
	 * @return string The additional root rules CSS.
	 */
	public function get_root_layout_rules( $selector, $block_metadata, $options = array() ) {
		$css              = '';
		$settings         = $this->theme_json['settings'] ?? array();
		$use_root_padding = isset( $this->theme_json['settings']['useRootPaddingAwareAlignments'] ) && true === $this->theme_json['settings']['useRootPaddingAwareAlignments'];

		/*
		 * If there are content and wide widths in theme.json, output them
		 * as custom properties on the body element so all blocks can use them.
		 */
		if ( isset( $settings['layout']['contentSize'] ) || isset( $settings['layout']['wideSize'] ) ) {
			$content_size = $settings['layout']['contentSize'] ?? $settings['layout']['wideSize'];
			$content_size = static::is_safe_css_declaration( 'max-width', $content_size ) ? $content_size : 'initial';
			$wide_size    = $settings['layout']['wideSize'] ?? $settings['layout']['contentSize'];
			$wide_size    = static::is_safe_css_declaration( 'max-width', $wide_size ) ? $wide_size : 'initial';
			$css         .= static::ROOT_CSS_PROPERTIES_SELECTOR . ' { --wp--style--global--content-size: ' . $content_size . ';';
			$css         .= '--wp--style--global--wide-size: ' . $wide_size . '; }';
		}

		/*
		 * Reset default browser margin on the body element.
		 * This is set on the body selector **before** generating the ruleset
		 * from the `theme.json`. This is to ensure that if the `theme.json` declares
		 * `margin` in its `spacing` declaration for the `body` element then these
		 * user-generated values take precedence in the CSS cascade.
		 * @link https://github.com/WordPress/gutenberg/issues/36147.
		 */
		$css .= ':where(body) { margin: 0; }';

		if ( $use_root_padding ) {
			// Top and bottom padding are applied to the outer block container.
			$css .= '.wp-site-blocks { padding-top: var(--wp--style--root--padding-top); padding-bottom: var(--wp--style--root--padding-bottom); }';
			// Right and left padding are applied to the first container with `.has-global-padding` class.
			$css .= '.has-global-padding { padding-right: var(--wp--style--root--padding-right); padding-left: var(--wp--style--root--padding-left); }';
			// Alignfull children of the container with left and right padding have negative margins so they can still be full width.
			$css .= '.has-global-padding > .alignfull { margin-right: calc(var(--wp--style--root--padding-right) * -1); margin-left: calc(var(--wp--style--root--padding-left) * -1); }';
			// Nested children of the container with left and right padding that are not full aligned do not get padding, unless they are direct children of an alignfull flow container.
			$css .= '.has-global-padding :where(:not(.alignfull.is-layout-flow) > .has-global-padding:not(.wp-block-block, .alignfull)) { padding-right: 0; padding-left: 0; }';
			// Alignfull direct children of the containers that are targeted by the rule above do not need negative margins.
			$css .= '.has-global-padding :where(:not(.alignfull.is-layout-flow) > .has-global-padding:not(.wp-block-block, .alignfull)) > .alignfull { margin-left: 0; margin-right: 0; }';
		}

		// Skip outputting alignment styles when base_layout_styles is enabled.
		// These styles target .wp-site-blocks which is only used by block themes.
		if ( empty( $options['base_layout_styles'] ) ) {
			$css .= '.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }';
			$css .= '.wp-site-blocks > .alignright { float: right; margin-left: 2em; }';
			$css .= '.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }';
		}

		// Block gap styles will be output unless explicitly set to `null`.
		if ( isset( $this->theme_json['settings']['spacing']['blockGap'] ) ) {
			$block_gap_value = static::get_property_value( $this->theme_json, array( 'styles', 'spacing', 'blockGap' ) );
			$css            .= ":where(.wp-site-blocks) > * { margin-block-start: $block_gap_value; margin-block-end: 0; }";
			$css            .= ':where(.wp-site-blocks) > :first-child { margin-block-start: 0; }';
			$css            .= ':where(.wp-site-blocks) > :last-child { margin-block-end: 0; }';

			// For backwards compatibility, ensure the legacy block gap CSS variable is still available.
			$css .= static::ROOT_CSS_PROPERTIES_SELECTOR . " { --wp--style--block-gap: $block_gap_value; }";
		}
		$css .= $this->get_layout_styles( $block_metadata, $options );

		return $css;
	}

	/**
	 * For metadata values that can either be booleans or paths to booleans, gets the value.
	 *
	 *     $data = array(
	 *       'color' => array(
	 *         'defaultPalette' => true
	 *       )
	 *     );
	 *
	 *     static::get_metadata_boolean( $data, false );
	 *     // => false
	 *
	 *     static::get_metadata_boolean( $data, array( 'color', 'defaultPalette' ) );
	 *     // => true
	 *
	 * @since 6.0.0
	 *
	 * @param array      $data          The data to inspect.
	 * @param bool|array $path          Boolean or path to a boolean.
	 * @param bool       $default_value Default value if the referenced path is missing.
	 *                                  Default false.
	 * @return bool Value of boolean metadata.
	 */
	protected static function get_metadata_boolean( $data, $path, $default_value = false ) {
		if ( is_bool( $path ) ) {
			return $path;
		}

		if ( is_array( $path ) ) {
			$value = _wp_array_get( $data, $path );
			if ( null !== $value ) {
				return $value;
			}
		}

		return $default_value;
	}

	/**
	 * Merges new incoming data.
	 *
	 * @since 5.8.0
	 * @since 5.9.0 Duotone preset also has origins.
	 * @since 6.7.0 Replace background image objects during merge.
	 *
	 * @param WP_Theme_JSON $incoming Data to merge.
	 */
	public function merge( $incoming ) {
		$incoming_data    = $incoming->get_raw_data();
		$this->theme_json = array_replace_recursive( $this->theme_json, $incoming_data );

		/*
		 * Recompute all the spacing sizes based on the new hierarchy of data. In the constructor
		 * spacingScale and spacingSizes are both keyed by origin and VALID_ORIGINS is ordered, so
		 * we can allow partial spacingScale data to inherit missing data from earlier layers when
		 * computing the spacing sizes.
		 *
		 * This happens before the presets are merged to ensure that default spacing sizes can be
		 * removed from the theme origin if $prevent_override is true.
		 */
		$flattened_spacing_scale = array();
		foreach ( static::VALID_ORIGINS as $origin ) {
			$scale_path = array( 'settings', 'spacing', 'spacingScale', $origin );

			// Apply the base spacing scale to the current layer.
			$base_spacing_scale      = _wp_array_get( $this->theme_json, $scale_path, array() );
			$flattened_spacing_scale = array_replace( $flattened_spacing_scale, $base_spacing_scale );

			$spacing_scale = _wp_array_get( $incoming_data, $scale_path, null );
			if ( ! isset( $spacing_scale ) ) {
				continue;
			}

			// Allow partial scale settings by merging with lower layers.
			$flattened_spacing_scale = array_replace( $flattened_spacing_scale, $spacing_scale );

			// Generate and merge the scales for this layer.
			$sizes_path           = array( 'settings', 'spacing', 'spacingSizes', $origin );
			$spacing_sizes        = _wp_array_get( $incoming_data, $sizes_path, array() );
			$spacing_scale_sizes  = static::compute_spacing_sizes( $flattened_spacing_scale );
			$merged_spacing_sizes = static::merge_spacing_sizes( $spacing_scale_sizes, $spacing_sizes );

			_wp_array_set( $incoming_data, $sizes_path, $merged_spacing_sizes );
		}

		/*
		 * The array_replace_recursive algorithm merges at the leaf level,
		 * but we don't want leaf arrays to be merged, so we overwrite it.
		 *
		 * For leaf values that are sequential arrays it will use the numeric indexes for replacement.
		 * We rather replace the existing with the incoming value, if it exists.
		 * This is the case of spacing.units.
		 *
		 * For leaf values that are associative arrays it will merge them as expected.
		 * This is also not the behavior we want for the current associative arrays (presets).
		 * We rather replace the existing with the incoming value, if it exists.
		 * This happens, for example, when we merge data from theme.json upon existing
		 * theme supports or when we merge anything coming from the same source twice.
		 * This is the case of color.palette, color.gradients, color.duotone,
		 * typography.fontSizes, or typography.fontFamilies.
		 *
		 * Additionally, for some preset types, we also want to make sure the
		 * values they introduce don't conflict with default values. We do so
		 * by checking the incoming slugs for theme presets and compare them
		 * with the equivalent default presets: if a slug is present as a default
		 * we remove it from the theme presets.
		 */
		$nodes        = static::get_setting_nodes( $incoming_data );
		$slugs_global = static::get_default_slugs( $this->theme_json, array( 'settings' ) );
		foreach ( $nodes as $node ) {
			// Replace the spacing.units.
			$path   = $node['path'];
			$path[] = 'spacing';
			$path[] = 'units';

			$content = _wp_array_get( $incoming_data, $path, null );
			if ( isset( $content ) ) {
				_wp_array_set( $this->theme_json, $path, $content );
			}

			// Replace the presets.
			foreach ( static::PRESETS_METADATA as $preset_metadata ) {
				$prevent_override = $preset_metadata['prevent_override'];
				if ( is_array( $prevent_override ) ) {
					$global_path  = array_merge( array( 'settings' ), $prevent_override );
					$global_value = _wp_array_get( $this->theme_json, $global_path, null );

					$node_level_path  = array_merge( $node['path'], $prevent_override );
					$prevent_override = _wp_array_get( $this->theme_json, $node_level_path, $global_value );
				}

				foreach ( static::VALID_ORIGINS as $origin ) {
					$base_path = $node['path'];
					foreach ( $preset_metadata['path'] as $leaf ) {
						$base_path[] = $leaf;
					}

					$path   = $base_path;
					$path[] = $origin;

					$content = _wp_array_get( $incoming_data, $path, null );
					if ( ! isset( $content ) ) {
						continue;
					}

					// Set names for theme presets based on the slug if they are not set and can use default names.
					if ( 'theme' === $origin && $preset_metadata['use_default_names'] ) {
						foreach ( $content as $key => $item ) {
							if ( ! isset( $item['name'] ) ) {
								$name = static::get_name_from_defaults( $item['slug'], $base_path );
								if ( null !== $name ) {
									$content[ $key ]['name'] = $name;
								}
							}
						}
					}

					// Filter out default slugs from theme presets when defaults should not be overridden.
					if ( 'theme' === $origin && $prevent_override ) {
						$slugs_node    = static::get_default_slugs( $this->theme_json, $node['path'] );
						$preset_global = _wp_array_get( $slugs_global, $preset_metadata['path'], array() );
						$preset_node   = _wp_array_get( $slugs_node, $preset_metadata['path'], array() );
						$preset_slugs  = array_merge_recursive( $preset_global, $preset_node );

						$content = static::filter_slugs( $content, $preset_slugs );
					}

					_wp_array_set( $this->theme_json, $path, $content );
				}
			}
		}

		/*
		 * Style values are merged at the leaf level, however
		 * some values provide exceptions, namely style values that are
		 * objects and represent unique definitions for the style.
		 */
		$style_nodes = static::get_block_nodes(
			$this->theme_json,
			array(),
			array( 'include_node_paths_only' => true )
		);

		// Add top-level styles.
		$style_nodes[] = array( 'path' => array( 'styles' ) );

		foreach ( $style_nodes as $style_node ) {
			$path = $style_node['path'];
			/*
			 * Background image styles should be replaced, not merged,
			 * as they themselves are specific object definitions for the style.
			 */
			$background_image_path = array_merge( $path, static::PROPERTIES_METADATA['background-image'] );
			$content               = _wp_array_get( $incoming_data, $background_image_path, null );
			if ( isset( $content ) ) {
				_wp_array_set( $this->theme_json, $background_image_path, $content );
			}
		}
	}

	/**
	 * Converts all filter (duotone) presets into SVGs.
	 *
	 * @since 5.9.1
	 *
	 * @param array $origins List of origins to process.
	 * @return string SVG filters.
	 */
	public function get_svg_filters( $origins ) {
		$blocks_metadata = static::get_blocks_metadata();
		$setting_nodes   = static::get_setting_nodes( $this->theme_json, $blocks_metadata );

		$filters = '';
		foreach ( $setting_nodes as $metadata ) {
			$node = _wp_array_get( $this->theme_json, $metadata['path'], array() );
			if ( empty( $node['color']['duotone'] ) ) {
				continue;
			}

			$duotone_presets = $node['color']['duotone'];

			foreach ( $origins as $origin ) {
				if ( ! isset( $duotone_presets[ $origin ] ) ) {
					continue;
				}
				foreach ( $duotone_presets[ $origin ] as $duotone_preset ) {
					$filters .= WP_Duotone::get_filter_svg_from_preset( $duotone_preset );
				}
			}
		}

		return $filters;
	}

	/**
	 * Determines whether a presets should be overridden or not.
	 *
	 * @since 5.9.0
	 * @deprecated 6.0.0 Use {@see 'get_metadata_boolean'} instead.
	 *
	 * @param array      $theme_json The theme.json like structure to inspect.
	 * @param array      $path       Path to inspect.
	 * @param bool|array $override   Data to compute whether to override the preset.
	 * @return bool|null True if the preset should override the defaults, false if not. Null if the override parameter is invalid.
	 */
	protected static function should_override_preset( $theme_json, $path, $override ) {
		_deprecated_function( __METHOD__, '6.0.0', 'get_metadata_boolean' );

		if ( is_bool( $override ) ) {
			return $override;
		}

		/*
		 * The relationship between whether to override the defaults
		 * and whether the defaults are enabled is inverse:
		 *
		 * - If defaults are enabled  => theme presets should not be overridden
		 * - If defaults are disabled => theme presets should be overridden
		 *
		 * For example, a theme sets defaultPalette to false,
		 * making the default palette hidden from the user.
		 * In that case, we want all the theme presets to be present,
		 * so they should override the defaults.
		 */
		if ( is_array( $override ) ) {
			$value = _wp_array_get( $theme_json, array_merge( $path, $override ) );
			if ( isset( $value ) ) {
				return ! $value;
			}

			// Search the top-level key if none was found for this node.
			$value = _wp_array_get( $theme_json, array_merge( array( 'settings' ), $override ) );
			if ( isset( $value ) ) {
				return ! $value;
			}

			return true;
		}

		return null;
	}

	/**
	 * Returns the default slugs for all the presets in an associative array
	 * whose keys are the preset paths and the leaves is the list of slugs.
	 *
	 * For example:
	 *
	 *     array(
	 *       'color' => array(
	 *         'palette'   => array( 'slug-1', 'slug-2' ),
	 *         'gradients' => array( 'slug-3', 'slug-4' ),
	 *       ),
	 *     )
	 *
	 * @since 5.9.0
	 *
	 * @param array $data      A theme.json like structure.
	 * @param array $node_path The path to inspect. It's 'settings' by default.
	 * @return array
	 */
	protected static function get_default_slugs( $data, $node_path ) {
		$slugs = array();

		foreach ( static::PRESETS_METADATA as $metadata ) {
			$path = $node_path;
			foreach ( $metadata['path'] as $leaf ) {
				$path[] = $leaf;
			}
			$path[] = 'default';

			$preset = _wp_array_get( $data, $path, null );
			if ( ! isset( $preset ) ) {
				continue;
			}

			$slugs_for_preset = array();
			foreach ( $preset as $item ) {
				if ( isset( $item['slug'] ) ) {
					$slugs_for_preset[] = $item['slug'];
				}
			}

			_wp_array_set( $slugs, $metadata['path'], $slugs_for_preset );
		}

		return $slugs;
	}

	/**
	 * Gets a `default`'s preset name by a provided slug.
	 *
	 * @since 5.9.0
	 *
	 * @param string $slug The slug we want to find a match from default presets.
	 * @param array  $base_path The path to inspect. It's 'settings' by default.
	 * @return string|null
	 */
	protected function get_name_from_defaults( $slug, $base_path ) {
		$path            = $base_path;
		$path[]          = 'default';
		$default_content = _wp_array_get( $this->theme_json, $path, null );
		if ( ! $default_content ) {
			return null;
		}
		foreach ( $default_content as $item ) {
			if ( $slug === $item['slug'] ) {
				return $item['name'];
			}
		}
		return null;
	}

	/**
	 * Removes the preset values whose slug is equal to any of given slugs.
	 *
	 * @since 5.9.0
	 *
	 * @param array $node  The node with the presets to validate.
	 * @param array $slugs The slugs that should not be overridden.
	 * @return array The new node.
	 */
	protected static function filter_slugs( $node, $slugs ) {
		if ( empty( $slugs ) ) {
			return $node;
		}

		$new_node = array();
		foreach ( $node as $value ) {
			if ( isset( $value['slug'] ) && ! in_array( $value['slug'], $slugs, true ) ) {
				$new_node[] = $value;
			}
		}

		return $new_node;
	}

	/**
	 * Removes insecure data from theme.json.
	 *
	 * @since 5.9.0
	 * @since 6.3.2 Preserves global styles block variations when securing styles.
	 * @since 6.6.0 Updated to allow variation element styles and $origin parameter.
	 *
	 * @param array  $theme_json Structure to sanitize.
	 * @param string $origin     Optional. What source of data this object represents.
	 *                           One of 'blocks', 'default', 'theme', or 'custom'. Default 'theme'.
	 * @return array Sanitized structure.
	 */
	public static function remove_insecure_properties( $theme_json, $origin = 'theme' ) {
		if ( ! in_array( $origin, static::VALID_ORIGINS, true ) ) {
			$origin = 'theme';
		}

		$sanitized = array();

		$theme_json = WP_Theme_JSON_Schema::migrate( $theme_json, $origin );

		$blocks_metadata     = static::get_blocks_metadata();
		$valid_block_names   = array_keys( $blocks_metadata );
		$valid_element_names = array_keys( static::ELEMENTS );
		$valid_variations    = static::get_valid_block_style_variations( $blocks_metadata );

		$theme_json = static::sanitize( $theme_json, $valid_block_names, $valid_element_names, $valid_variations );

		$blocks_metadata          = static::get_blocks_metadata();
		$style_options            = array( 'include_block_style_variations' => true ); // Allow variations data.
		$style_nodes              = static::get_style_nodes( $theme_json, $blocks_metadata, $style_options );
		$responsive_media_queries = static::get_viewport_media_queries( $theme_json['settings']['viewport'] ?? null );

		foreach ( $style_nodes as $metadata ) {
			$input = _wp_array_get( $theme_json, $metadata['path'], array() );
			if ( empty( $input ) ) {
				continue;
			}

			$block_name = in_array( 'blocks', $metadata['path'], true )
				? static::get_block_name_from_metadata_path( $metadata )
				: null;

			// The global styles custom CSS is not sanitized, but can only be edited by users with 'edit_css' capability.
			if ( isset( $input['css'] ) && current_user_can( 'edit_css' ) ) {
				$output = $input;
			} else {
				$output = static::remove_insecure_styles( $input );
			}

			/*
			 * Get a reference to element name from path.
			 * $metadata['path'] = array( 'styles', 'elements', 'link' );
			 */
			$current_element = array_last( $metadata['path'] );

			/*
			 * $output is stripped of pseudo selectors. Re-add and process them
			 * or insecure styles here.
			 */
			if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] ) ) {
				foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] as $pseudo_selector ) {
					if ( isset( $input[ $pseudo_selector ] ) ) {
						$output[ $pseudo_selector ] = static::remove_insecure_styles( $input[ $pseudo_selector ] );
					}
				}
			}

			// Re-add and process responsive breakpoint styles.
			foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
				if ( isset( $input[ $breakpoint ] ) ) {
					$output[ $breakpoint ] = static::remove_insecure_styles( $input[ $breakpoint ] );

					if ( isset( $input[ $breakpoint ]['elements'] ) ) {
						$output[ $breakpoint ]['elements'] = static::remove_insecure_element_styles( $input[ $breakpoint ]['elements'], $responsive_media_queries );
					}

					if ( isset( $input[ $breakpoint ]['blocks'] ) ) {
						$output[ $breakpoint ]['blocks'] = static::remove_insecure_inner_block_styles( $input[ $breakpoint ]['blocks'], $responsive_media_queries );
					}

					if ( $block_name && isset( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_name ] ) ) {
						foreach ( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_name ] as $pseudo_selector ) {
							if ( isset( $input[ $breakpoint ][ $pseudo_selector ] ) ) {
								$output[ $breakpoint ][ $pseudo_selector ] = static::remove_insecure_styles( $input[ $breakpoint ][ $pseudo_selector ] );
							}
						}
					}

					// Responsive custom CSS is allowed for users with 'edit_css' capability.
					if ( isset( $input[ $breakpoint ]['css'] ) && current_user_can( 'edit_css' ) ) {
						$output[ $breakpoint ]['css'] = $input[ $breakpoint ]['css'];
					}
				}
			}

			if ( ! empty( $output ) ) {
				_wp_array_set( $sanitized, $metadata['path'], $output );
			}

			if ( isset( $metadata['variations'] ) ) {
				foreach ( $metadata['variations'] as $variation ) {
					$variation_input = _wp_array_get( $theme_json, $variation['path'], array() );
					if ( empty( $variation_input ) ) {
						continue;
					}

					$variation_output = static::remove_insecure_styles( $variation_input );

					if ( isset( $variation_input['blocks'] ) ) {
						$variation_output['blocks'] = static::remove_insecure_inner_block_styles( $variation_input['blocks'], $responsive_media_queries );
					}

					if ( isset( $variation_input['elements'] ) ) {
						$variation_output['elements'] = static::remove_insecure_element_styles( $variation_input['elements'], $responsive_media_queries );
					}

					// Re-add and process responsive breakpoint styles for variations.
					foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
						if ( isset( $variation_input[ $breakpoint ] ) ) {
							$variation_output[ $breakpoint ] = static::remove_insecure_styles( $variation_input[ $breakpoint ] );

							if ( isset( $variation_input[ $breakpoint ]['elements'] ) ) {
								$variation_output[ $breakpoint ]['elements'] = static::remove_insecure_element_styles( $variation_input[ $breakpoint ]['elements'], $responsive_media_queries );
							}

							if ( isset( $variation_input[ $breakpoint ]['blocks'] ) ) {
								$variation_output[ $breakpoint ]['blocks'] = static::remove_insecure_inner_block_styles( $variation_input[ $breakpoint ]['blocks'], $responsive_media_queries );
							}

							if ( $block_name && isset( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_name ] ) ) {
								foreach ( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_name ] as $pseudo_selector ) {
									if ( isset( $variation_input[ $breakpoint ][ $pseudo_selector ] ) ) {
										$variation_output[ $breakpoint ][ $pseudo_selector ] = static::remove_insecure_styles( $variation_input[ $breakpoint ][ $pseudo_selector ] );
									}
								}
							}

							// Responsive custom CSS is allowed for users with 'edit_css' capability.
							if ( isset( $variation_input[ $breakpoint ]['css'] ) && current_user_can( 'edit_css' ) ) {
								$variation_output[ $breakpoint ]['css'] = $variation_input[ $breakpoint ]['css'];
							}
						}
					}

					if ( ! empty( $variation_output ) ) {
						_wp_array_set( $sanitized, $variation['path'], $variation_output );
					}
				}
			}
		}

		$setting_nodes = static::get_setting_nodes( $theme_json );
		foreach ( $setting_nodes as $metadata ) {
			$input = _wp_array_get( $theme_json, $metadata['path'], array() );
			if ( empty( $input ) ) {
				continue;
			}

			$output = static::remove_insecure_settings( $input, array( 'settings' ) === $metadata['path'] );
			if ( ! empty( $output ) ) {
				_wp_array_set( $sanitized, $metadata['path'], $output );
			}
		}

		if ( empty( $sanitized['styles'] ) ) {
			unset( $theme_json['styles'] );
		} else {
			$theme_json['styles'] = $sanitized['styles'];
		}

		if ( empty( $sanitized['settings'] ) ) {
			unset( $theme_json['settings'] );
		} else {
			$theme_json['settings'] = $sanitized['settings'];
		}

		return $theme_json;
	}

	/**
	 * Remove insecure element styles within a variation or block.
	 *
	 *  * When responsive media queries are provided, nested responsive state styles
	 * matching those viewport state keys are re-added after the base sanitization pass.
	 *
	 * @since 6.8.0
	 * @since 7.1.0 Added the `$responsive_media_queries` parameter.
	 *
	 * @param array      $elements                 The elements to process.
	 * @param array|null $responsive_media_queries Optional. Media queries whose keys define allowed
	 *                                             viewport states. Default null.
	 * @return array The sanitized elements styles.
	 */
	protected static function remove_insecure_element_styles( $elements, $responsive_media_queries = null ) {
		$sanitized           = array();
		$valid_element_names = array_keys( static::ELEMENTS );

		foreach ( $valid_element_names as $element_name ) {
			$element_input = $elements[ $element_name ] ?? null;
			if ( $element_input ) {
				$element_output = static::remove_insecure_styles( $element_input );

				if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] ) ) {
					foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] as $pseudo_selector ) {
						if ( isset( $element_input[ $pseudo_selector ] ) ) {
							$element_output[ $pseudo_selector ] = static::remove_insecure_styles( $element_input[ $pseudo_selector ] );
						}
					}
				}

				if ( null !== $responsive_media_queries ) {
					// Re-add and process responsive breakpoint styles for elements.
					foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
						if ( isset( $element_input[ $breakpoint ] ) ) {
							$element_output[ $breakpoint ] = static::remove_insecure_styles( $element_input[ $breakpoint ] );

							if ( isset( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] ) ) {
								foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $element_name ] as $pseudo_selector ) {
									if ( isset( $element_input[ $breakpoint ][ $pseudo_selector ] ) ) {
										$element_output[ $breakpoint ][ $pseudo_selector ] = static::remove_insecure_styles( $element_input[ $breakpoint ][ $pseudo_selector ] );
									}
								}
							}
						}
					}
				}

				$sanitized[ $element_name ] = $element_output;
			}
		}
		return $sanitized;
	}

	/**
	 * Remove insecure styles from inner blocks and their elements.
	 *
	 * When responsive media queries are provided, nested responsive state styles
	 * for those media-query keys are re-added after the base sanitization pass.
	 *
	 * @since 6.8.0
	 * @since 7.1.0 Added the `$responsive_media_queries` parameter.
	 *
	 * @param array      $blocks                   The block styles to process.
	 * @param array|null $responsive_media_queries Optional. Media queries whose keys define allowed
	 *                                             viewport states. Default null.
	 * @return array Sanitized block type styles.
	 */
	protected static function remove_insecure_inner_block_styles( $blocks, $responsive_media_queries = null ) {
		$sanitized = array();
		foreach ( $blocks as $block_type => $block_input ) {
			$block_output = static::remove_insecure_styles( $block_input );

			if ( isset( $block_input['elements'] ) ) {
				$block_output['elements'] = static::remove_insecure_element_styles( $block_input['elements'], $responsive_media_queries );
			}

			if ( null !== $responsive_media_queries ) {
				// Re-add and process responsive breakpoint styles for inner blocks.
				foreach ( array_keys( $responsive_media_queries ) as $breakpoint ) {
					if ( isset( $block_input[ $breakpoint ] ) ) {
						$block_output[ $breakpoint ] = static::remove_insecure_styles( $block_input[ $breakpoint ] );

						if ( isset( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_type ] ) ) {
							foreach ( static::VALID_BLOCK_PSEUDO_SELECTORS[ $block_type ] as $pseudo_selector ) {
								if ( isset( $block_input[ $breakpoint ][ $pseudo_selector ] ) ) {
									$block_output[ $breakpoint ][ $pseudo_selector ] = static::remove_insecure_styles( $block_input[ $breakpoint ][ $pseudo_selector ] );
								}
							}
						}
					}
				}
			}

			$sanitized[ $block_type ] = $block_output;
		}
		return $sanitized;
	}

	/**
	 * Preserves valid typed settings from input to output based on type markers in schema.
	 *
	 * Recursively iterates through the schema and validates/preserves settings
	 * that have type markers (e.g., boolean) in VALID_SETTINGS.
	 *
	 * @since 7.0.0
	 *
	 * @param array             $input  Input settings to process.
	 * @param array             $output Output settings array (passed by reference).
	 * @param array             $schema Schema to validate against (typically VALID_SETTINGS).
	 * @param array<string|int> $path   Current path in the schema (for recursive calls).
	 */
	private static function preserve_valid_typed_settings( $input, &$output, $schema, $path = array() ) {
		foreach ( $schema as $key => $schema_value ) {
			$current_path = array_merge( $path, array( $key ) );

			// Validate boolean type markers.
			if ( is_bool( $schema_value ) ) {
				$value = _wp_array_get( $input, $current_path, null );
				if ( is_bool( $value ) ) {
					_wp_array_set( $output, $current_path, $value ); // Preserve boolean value.
				}
			} elseif ( is_array( $schema_value ) ) {
				self::preserve_valid_typed_settings( $input, $output, $schema_value, $current_path ); // Recurse into nested structure.
			}
		}
	}

	/**
	 * Processes a setting node and returns the same node
	 * without the insecure settings.
	 *
	 * @since 5.9.0
	 * @since 7.1.0 Added the `$is_root` parameter.
	 *
	 * @param array $input   Node to process.
	 * @param bool  $is_root Optional. Whether the node is the root settings node. Default false.
	 * @return array
	 */
	protected static function remove_insecure_settings( $input, $is_root = false ) {
		$output = array();
		foreach ( static::PRESETS_METADATA as $preset_metadata ) {
			foreach ( static::VALID_ORIGINS as $origin ) {
				$path_with_origin   = $preset_metadata['path'];
				$path_with_origin[] = $origin;
				$presets            = _wp_array_get( $input, $path_with_origin, null );
				if ( null === $presets ) {
					continue;
				}

				$escaped_preset = array();
				foreach ( $presets as $preset ) {
					if (
						esc_attr( esc_html( $preset['name'] ) ) === $preset['name'] &&
						sanitize_html_class( $preset['slug'] ) === $preset['slug']
					) {
						$value = null;
						if ( isset( $preset_metadata['value_key'], $preset[ $preset_metadata['value_key'] ] ) ) {
							$value = $preset[ $preset_metadata['value_key'] ];
						} elseif (
							isset( $preset_metadata['value_func'] ) &&
							is_callable( $preset_metadata['value_func'] )
						) {
							$value = call_user_func( $preset_metadata['value_func'], $preset );
						}

						$preset_is_valid = true;
						foreach ( $preset_metadata['properties'] as $property ) {
							if ( ! static::is_safe_css_declaration( $property, $value ) ) {
								$preset_is_valid = false;
								break;
							}
						}

						if ( $preset_is_valid ) {
							$escaped_preset[] = $preset;
						}
					}
				}

				if ( ! empty( $escaped_preset ) ) {
					_wp_array_set( $output, $path_with_origin, $escaped_preset );
				}
			}
		}

		// Ensure indirect properties not included in any `PRESETS_METADATA` value are allowed.
		static::remove_indirect_properties( $input, $output );

		// Preserve all valid settings that have type markers in VALID_SETTINGS.
		self::preserve_valid_typed_settings( $input, $output, static::VALID_SETTINGS );

		if ( $is_root && array_key_exists( 'viewport', $input ) ) {
			$output['viewport'] = static::sanitize_viewport_settings( $input['viewport'] );
		}

		return $output;
	}

	/**
	 * Processes a style node and returns the same node
	 * without the insecure styles.
	 *
	 * @since 5.9.0
	 *
	 * @param array $input Node to process.
	 * @return array
	 */
	protected static function remove_insecure_styles( $input ) {
		$output       = array();
		$declarations = static::compute_style_properties( $input );

		foreach ( $declarations as $declaration ) {
			if ( static::is_safe_css_declaration( $declaration['name'], $declaration['value'] ) ) {
				$path = static::PROPERTIES_METADATA[ $declaration['name'] ];

				/*
				 * Check the value isn't an array before adding so as to not
				 * double up shorthand and longhand styles.
				 */
				$value = _wp_array_get( $input, $path, array() );
				if ( ! is_array( $value ) ) {
					_wp_array_set( $output, $path, $value );
				}
			}
		}

		// Ensure indirect properties not handled by `compute_style_properties` are allowed.
		static::remove_indirect_properties( $input, $output );

		return $output;
	}

	/**
	 * Checks that a declaration provided by the user is safe.
	 *
	 * @since 5.9.0
	 *
	 * @param string $property_name  Property name in a CSS declaration, i.e. the `color` in `color: red`.
	 * @param string $property_value Value in a CSS declaration, i.e. the `red` in `color: red`.
	 * @return bool
	 */
	protected static function is_safe_css_declaration( $property_name, $property_value ) {
		$style_to_validate = $property_name . ': ' . $property_value;
		$filtered          = esc_html( safecss_filter_attr( $style_to_validate ) );
		return ! empty( trim( $filtered ) );
	}

	/**
	 * Removes indirect properties from the given input node and
	 * sets in the given output node.
	 *
	 * @since 6.2.0
	 *
	 * @param array $input  Node to process.
	 * @param array $output The processed node. Passed by reference.
	 */
	private static function remove_indirect_properties( $input, &$output ) {
		foreach ( static::INDIRECT_PROPERTIES_METADATA as $property => $paths ) {
			foreach ( $paths as $path ) {
				$value = _wp_array_get( $input, $path );
				if (
					is_string( $value ) &&
					static::is_safe_css_declaration( $property, $value )
				) {
					_wp_array_set( $output, $path, $value );
				}
			}
		}
	}

	/**
	 * Returns the raw data.
	 *
	 * @since 5.8.0
	 *
	 * @return array Raw data.
	 */
	public function get_raw_data() {
		return $this->theme_json;
	}

	/**
	 * Transforms the given editor settings according the
	 * add_theme_support format to the theme.json format.
	 *
	 * @since 5.8.0
	 *
	 * @param array $settings Existing editor settings.
	 * @return array Config that adheres to the theme.json schema.
	 */
	public static function get_from_editor_settings( $settings ) {
		$theme_settings = array(
			'version'  => static::LATEST_SCHEMA,
			'settings' => array(),
		);

		// Deprecated theme supports.
		if ( isset( $settings['disableCustomColors'] ) ) {
			$theme_settings['settings']['color']['custom'] = ! $settings['disableCustomColors'];
		}

		if ( isset( $settings['disableCustomGradients'] ) ) {
			$theme_settings['settings']['color']['customGradient'] = ! $settings['disableCustomGradients'];
		}

		if ( isset( $settings['disableCustomFontSizes'] ) ) {
			$theme_settings['settings']['typography']['customFontSize'] = ! $settings['disableCustomFontSizes'];
		}

		if ( isset( $settings['enableCustomLineHeight'] ) ) {
			$theme_settings['settings']['typography']['lineHeight'] = $settings['enableCustomLineHeight'];
		}

		if ( isset( $settings['enableCustomUnits'] ) ) {
			$theme_settings['settings']['spacing']['units'] = ( true === $settings['enableCustomUnits'] ) ?
				array( 'px', 'em', 'rem', 'vh', 'vw', '%' ) :
				$settings['enableCustomUnits'];
		}

		if ( isset( $settings['colors'] ) ) {
			$theme_settings['settings']['color']['palette'] = $settings['colors'];
		}

		if ( isset( $settings['gradients'] ) ) {
			$theme_settings['settings']['color']['gradients'] = $settings['gradients'];
		}

		if ( isset( $settings['fontSizes'] ) ) {
			$font_sizes = $settings['fontSizes'];
			// Back-compatibility for presets without units.
			foreach ( $font_sizes as $key => $font_size ) {
				if ( is_numeric( $font_size['size'] ) ) {
					$font_sizes[ $key ]['size'] = $font_size['size'] . 'px';
				}
			}
			$theme_settings['settings']['typography']['fontSizes'] = $font_sizes;
		}

		if ( isset( $settings['enableCustomSpacing'] ) ) {
			$theme_settings['settings']['spacing']['padding'] = $settings['enableCustomSpacing'];
		}

		if ( isset( $settings['spacingSizes'] ) ) {
			$theme_settings['settings']['spacing']['spacingSizes'] = $settings['spacingSizes'];
		}

		return $theme_settings;
	}

	/**
	 * Returns the current theme's wanted patterns(slugs) to be
	 * registered from Pattern Directory.
	 *
	 * @since 6.0.0
	 *
	 * @return string[]
	 */
	public function get_patterns() {
		if ( isset( $this->theme_json['patterns'] ) && is_array( $this->theme_json['patterns'] ) ) {
			return $this->theme_json['patterns'];
		}
		return array();
	}

	/**
	 * Returns a valid theme.json as provided by a theme.
	 *
	 * Unlike get_raw_data() this returns the presets flattened, as provided by a theme.
	 * This also uses appearanceTools instead of their opt-ins if all of them are true.
	 *
	 * @since 6.0.0
	 *
	 * @return array
	 */
	public function get_data() {
		$output = $this->theme_json;
		$nodes  = static::get_setting_nodes( $output );

		/**
		 * Flatten the theme & custom origins into a single one.
		 *
		 * For example, the following:
		 *
		 * {
		 *   "settings": {
		 *     "color": {
		 *       "palette": {
		 *         "theme": [ {} ],
		 *         "custom": [ {} ]
		 *       }
		 *     }
		 *   }
		 * }
		 *
		 * will be converted to:
		 *
		 * {
		 *   "settings": {
		 *     "color": {
		 *       "palette": [ {} ]
		 *     }
		 *   }
		 * }
		 */
		foreach ( $nodes as $node ) {
			foreach ( static::PRESETS_METADATA as $preset_metadata ) {
				$path = $node['path'];
				foreach ( $preset_metadata['path'] as $preset_metadata_path ) {
					$path[] = $preset_metadata_path;
				}
				$preset = _wp_array_get( $output, $path, null );
				if ( null === $preset ) {
					continue;
				}

				$items = array();
				if ( isset( $preset['theme'] ) ) {
					foreach ( $preset['theme'] as $item ) {
						$slug = $item['slug'];
						unset( $item['slug'] );
						$items[ $slug ] = $item;
					}
				}
				if ( isset( $preset['custom'] ) ) {
					foreach ( $preset['custom'] as $item ) {
						$slug = $item['slug'];
						unset( $item['slug'] );
						$items[ $slug ] = $item;
					}
				}
				$flattened_preset = array();
				foreach ( $items as $slug => $value ) {
					$flattened_preset[] = array_merge( array( 'slug' => (string) $slug ), $value );
				}
				_wp_array_set( $output, $path, $flattened_preset );
			}
		}

		/*
		 * If all of the static::APPEARANCE_TOOLS_OPT_INS are true,
		 * this code unsets them and sets 'appearanceTools' instead.
		 */
		foreach ( $nodes as $node ) {
			$all_opt_ins_are_set = true;
			foreach ( static::APPEARANCE_TOOLS_OPT_INS as $opt_in_path ) {
				$full_path = $node['path'];
				foreach ( $opt_in_path as $opt_in_path_item ) {
					$full_path[] = $opt_in_path_item;
				}
				/*
				 * Use "unset prop" as a marker instead of "null" because
				 * "null" can be a valid value for some props (e.g. blockGap).
				 */
				$opt_in_value = _wp_array_get( $output, $full_path, 'unset prop' );
				if ( 'unset prop' === $opt_in_value ) {
					$all_opt_ins_are_set = false;
					break;
				}
			}

			if ( $all_opt_ins_are_set ) {
				$node_path_with_appearance_tools   = $node['path'];
				$node_path_with_appearance_tools[] = 'appearanceTools';
				_wp_array_set( $output, $node_path_with_appearance_tools, true );
				foreach ( static::APPEARANCE_TOOLS_OPT_INS as $opt_in_path ) {
					$full_path = $node['path'];
					foreach ( $opt_in_path as $opt_in_path_item ) {
						$full_path[] = $opt_in_path_item;
					}
					/*
					 * Use "unset prop" as a marker instead of "null" because
					 * "null" can be a valid value for some props (e.g. blockGap).
					 */
					$opt_in_value = _wp_array_get( $output, $full_path, 'unset prop' );
					if ( true !== $opt_in_value ) {
						continue;
					}

					/*
					 * The following could be improved to be path independent.
					 * At the moment it relies on a couple of assumptions:
					 *
					 * - all opt-ins having a path of size 2.
					 * - there's two sources of settings: the top-level and the block-level.
					 */
					if (
						( 1 === count( $node['path'] ) ) &&
						( 'settings' === $node['path'][0] )
					) {
						// Top-level settings.
						unset( $output['settings'][ $opt_in_path[0] ][ $opt_in_path[1] ] );
						if ( empty( $output['settings'][ $opt_in_path[0] ] ) ) {
							unset( $output['settings'][ $opt_in_path[0] ] );
						}
					} elseif (
						( 3 === count( $node['path'] ) ) &&
						( 'settings' === $node['path'][0] ) &&
						( 'blocks' === $node['path'][1] )
					) {
						// Block-level settings.
						$block_name = $node['path'][2];
						unset( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ][ $opt_in_path[1] ] );
						if ( empty( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ] ) ) {
							unset( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ] );
						}
					}
				}
			}
		}

		wp_recursive_ksort( $output );

		return $output;
	}

	/**
	 * Sets the spacingSizes array based on the spacingScale values from theme.json.
	 *
	 * @since 6.1.0
	 * @deprecated 6.6.0 No longer used as the spacingSizes are automatically
	 *                   generated in the constructor and merge methods instead
	 *                   of manually after instantiation.
	 *
	 * @return void
	 */
	public function set_spacing_sizes() {
		_deprecated_function( __METHOD__, '6.6.0' );

		$spacing_scale = $this->theme_json['settings']['spacing']['spacingScale'] ?? array();

		if ( ! isset( $spacing_scale['steps'] )
			|| ! is_numeric( $spacing_scale['steps'] )
			|| ! isset( $spacing_scale['mediumStep'] )
			|| ! isset( $spacing_scale['unit'] )
			|| ! isset( $spacing_scale['operator'] )
			|| ! isset( $spacing_scale['increment'] )
			|| ! isset( $spacing_scale['steps'] )
			|| ! is_numeric( $spacing_scale['increment'] )
			|| ! is_numeric( $spacing_scale['mediumStep'] )
			|| ( '+' !== $spacing_scale['operator'] && '*' !== $spacing_scale['operator'] ) ) {
			if ( ! empty( $spacing_scale ) ) {
				wp_trigger_error(
					__METHOD__,
					sprintf(
						/* translators: 1: theme.json, 2: settings.spacing.spacingScale */
						__( 'Some of the %1$s %2$s values are invalid' ),
						'theme.json',
						'settings.spacing.spacingScale'
					),
					E_USER_NOTICE
				);
			}
			return;
		}

		// If theme authors want to prevent the generation of the core spacing scale they can set their theme.json spacingScale.steps to 0.
		if ( 0 === $spacing_scale['steps'] ) {
			return;
		}

		$spacing_sizes = static::compute_spacing_sizes( $spacing_scale );

		// If there are 7 or fewer steps in the scale revert to numbers for labels instead of t-shirt sizes.
		if ( $spacing_scale['steps'] <= 7 ) {
			for ( $spacing_sizes_count = 0; $spacing_sizes_count < count( $spacing_sizes ); $spacing_sizes_count++ ) {
				$spacing_sizes[ $spacing_sizes_count ]['name'] = (string) ( $spacing_sizes_count + 1 );
			}
		}

		_wp_array_set( $this->theme_json, array( 'settings', 'spacing', 'spacingSizes', 'default' ), $spacing_sizes );
	}

	/**
	 * Merges two sets of spacing size presets.
	 *
	 * @since 6.6.0
	 *
	 * @param array $base     The base set of spacing sizes.
	 * @param array $incoming The set of spacing sizes to merge with the base. Duplicate slugs will override the base values.
	 * @return array The merged set of spacing sizes.
	 */
	private static function merge_spacing_sizes( $base, $incoming ) {
		// Preserve the order if there are no base (spacingScale) values.
		if ( empty( $base ) ) {
			return $incoming;
		}
		$merged = array();
		foreach ( $base as $item ) {
			$merged[ $item['slug'] ] = $item;
		}
		foreach ( $incoming as $item ) {
			$merged[ $item['slug'] ] = $item;
		}
		ksort( $merged, SORT_NUMERIC );
		return array_values( $merged );
	}

	/**
	 * Generates a set of spacing sizes by starting with a medium size and
	 * applying an operator with an increment value to generate the rest of the
	 * sizes outward from the medium size. The medium slug is '50' with the rest
	 * of the slugs being 10 apart. The generated names use t-shirt sizing.
	 *
	 * Example:
	 *
	 *     $spacing_scale = array(
	 *         'steps'      => 4,
	 *         'mediumStep' => 16,
	 *         'unit'       => 'px',
	 *         'operator'   => '+',
	 *         'increment'  => 2,
	 *     );
	 *     $spacing_sizes = static::compute_spacing_sizes( $spacing_scale );
	 *     // -> array(
	 *     //        array( 'name' => 'Small',   'slug' => '40', 'size' => '14px' ),
	 *     //        array( 'name' => 'Medium',  'slug' => '50', 'size' => '16px' ),
	 *     //        array( 'name' => 'Large',   'slug' => '60', 'size' => '18px' ),
	 *     //        array( 'name' => 'X-Large', 'slug' => '70', 'size' => '20px' ),
	 *     //    )
	 *
	 * @since 6.6.0
	 *
	 * @param array $spacing_scale {
	 *      The spacing scale values. All are required.
	 *
	 *      @type int    $steps      The number of steps in the scale. (up to 10 steps are supported.)
	 *      @type float  $mediumStep The middle value that gets the slug '50'. (For even number of steps, this becomes the first middle value.)
	 *      @type string $unit       The CSS unit to use for the sizes.
	 *      @type string $operator   The mathematical operator to apply to generate the other sizes. Either '+' or '*'.
	 *      @type float  $increment  The value used with the operator to generate the other sizes.
	 * }
	 * @return array The spacing sizes presets or an empty array if some spacing scale values are missing or invalid.
	 */
	private static function compute_spacing_sizes( $spacing_scale ) {
		/*
		 * This condition is intentionally missing some checks on ranges for the values in order to
		 * keep backwards compatibility with the previous implementation.
		 */
		if (
			! isset( $spacing_scale['steps'] ) ||
			! is_numeric( $spacing_scale['steps'] ) ||
			0 === $spacing_scale['steps'] ||
			! isset( $spacing_scale['mediumStep'] ) ||
			! is_numeric( $spacing_scale['mediumStep'] ) ||
			! isset( $spacing_scale['unit'] ) ||
			! isset( $spacing_scale['operator'] ) ||
			( '+' !== $spacing_scale['operator'] && '*' !== $spacing_scale['operator'] ) ||
			! isset( $spacing_scale['increment'] ) ||
			! is_numeric( $spacing_scale['increment'] )
		) {
			return array();
		}

		$unit            = '%' === $spacing_scale['unit'] ? '%' : sanitize_title( $spacing_scale['unit'] );
		$current_step    = $spacing_scale['mediumStep'];
		$steps_mid_point = round( $spacing_scale['steps'] / 2, 0 );
		$x_small_count   = null;
		$below_sizes     = array();
		$slug            = 40;
		$remainder       = 0;

		for ( $below_midpoint_count = $steps_mid_point - 1; $spacing_scale['steps'] > 1 && $slug > 0 && $below_midpoint_count > 0; $below_midpoint_count-- ) {
			if ( '+' === $spacing_scale['operator'] ) {
				$current_step -= $spacing_scale['increment'];
			} elseif ( $spacing_scale['increment'] > 1 ) {
				$current_step /= $spacing_scale['increment'];
			} else {
				$current_step *= $spacing_scale['increment'];
			}

			if ( $current_step <= 0 ) {
				$remainder = $below_midpoint_count;
				break;
			}

			$below_sizes[] = array(
				/* translators: %s: Digit to indicate multiple of sizing, eg. 2X-Small. */
				'name' => $below_midpoint_count === $steps_mid_point - 1 ? __( 'Small' ) : sprintf( __( '%sX-Small' ), (string) $x_small_count ),
				'slug' => (string) $slug,
				'size' => round( $current_step, 2 ) . $unit,
			);

			if ( $below_midpoint_count === $steps_mid_point - 2 ) {
				$x_small_count = 2;
			}

			if ( $below_midpoint_count < $steps_mid_point - 2 ) {
				++$x_small_count;
			}

			$slug -= 10;
		}

		$below_sizes = array_reverse( $below_sizes );

		$below_sizes[] = array(
			'name' => __( 'Medium' ),
			'slug' => '50',
			'size' => $spacing_scale['mediumStep'] . $unit,
		);

		$current_step  = $spacing_scale['mediumStep'];
		$x_large_count = null;
		$above_sizes   = array();
		$slug          = 60;
		$steps_above   = ( $spacing_scale['steps'] - $steps_mid_point ) + $remainder;

		for ( $above_midpoint_count = 0; $above_midpoint_count < $steps_above; $above_midpoint_count++ ) {
			$current_step = '+' === $spacing_scale['operator']
				? $current_step + $spacing_scale['increment']
				: ( $spacing_scale['increment'] >= 1 ? $current_step * $spacing_scale['increment'] : $current_step / $spacing_scale['increment'] );

			$above_sizes[] = array(
				/* translators: %s: Digit to indicate multiple of sizing, eg. 2X-Large. */
				'name' => 0 === $above_midpoint_count ? __( 'Large' ) : sprintf( __( '%sX-Large' ), (string) $x_large_count ),
				'slug' => (string) $slug,
				'size' => round( $current_step, 2 ) . $unit,
			);

			if ( 1 === $above_midpoint_count ) {
				$x_large_count = 2;
			}

			if ( $above_midpoint_count > 1 ) {
				++$x_large_count;
			}

			$slug += 10;
		}

		$spacing_sizes = $below_sizes;
		foreach ( $above_sizes as $above_sizes_item ) {
			$spacing_sizes[] = $above_sizes_item;
		}

		return $spacing_sizes;
	}

	/**
	 * This is used to convert the internal representation of variables to the CSS representation.
	 * For example, `var:preset|color|vivid-green-cyan` becomes `var(--wp--preset--color--vivid-green-cyan)`.
	 *
	 * @since 6.3.0
	 *
	 * @param string $value The variable such as var:preset|color|vivid-green-cyan to convert.
	 * @return string The converted variable.
	 */
	private static function convert_custom_properties( $value ) {
		$prefix     = 'var:';
		$prefix_len = strlen( $prefix );
		$token_in   = '|';
		$token_out  = '--';
		if ( str_starts_with( $value, $prefix ) ) {
			$unwrapped_name = str_replace(
				$token_in,
				$token_out,
				substr( $value, $prefix_len )
			);
			$value          = "var(--wp--$unwrapped_name)";
		}

		return $value;
	}

	/**
	 * Given a tree, converts the internal representation of variables to the CSS representation.
	 * It is recursive and modifies the input in-place.
	 *
	 * @since 6.3.0
	 *
	 * @param array $tree Input to process.
	 * @return array The modified $tree.
	 */
	private static function resolve_custom_css_format( $tree ) {
		$prefix = 'var:';

		foreach ( $tree as $key => $data ) {
			if ( is_string( $data ) && str_starts_with( $data, $prefix ) ) {
				$tree[ $key ] = self::convert_custom_properties( $data );
			} elseif ( is_array( $data ) ) {
				$tree[ $key ] = self::resolve_custom_css_format( $data );
			}
		}

		return $tree;
	}

	/**
	 * Returns the selectors metadata for a block.
	 *
	 * @since 6.3.0
	 *
	 * @param object $block_type    The block type.
	 * @param string $root_selector The block's root selector.
	 * @return array The custom selectors set by the block.
	 */
	protected static function get_block_selectors( $block_type, $root_selector ) {
		if ( ! empty( $block_type->selectors ) ) {
			return $block_type->selectors;
		}

		$selectors = array( 'root' => $root_selector );
		foreach ( static::BLOCK_SUPPORT_FEATURE_LEVEL_SELECTORS as $key => $feature ) {
			$feature_selector = wp_get_block_css_selector( $block_type, $key );
			if ( null !== $feature_selector ) {
				$selectors[ $feature ] = array( 'root' => $feature_selector );
			}
		}

		return $selectors;
	}

	/**
	 * Generates all the element selectors for a block.
	 *
	 * @since 6.3.0
	 *
	 * @param string $root_selector The block's root CSS selector.
	 * @return array The block's element selectors.
	 */
	protected static function get_block_element_selectors( $root_selector ) {
		/*
		 * Assign defaults, then override those that the block sets by itself.
		 * If the block selector is compounded, will append the element to each
		 * individual block selector.
		 */
		$block_selectors   = explode( ',', $root_selector );
		$element_selectors = array();
		foreach ( static::ELEMENTS as $el_name => $el_selector ) {
			$element_selector = array();
			foreach ( $block_selectors as $selector ) {
				if ( $selector === $el_selector ) {
					$element_selector = array( $el_selector );
					break;
				}
				$element_selector[] = static::prepend_to_selector( $el_selector, $selector . ' ' );
			}
			$element_selectors[ $el_name ] = implode( ',', $element_selector );
		}

		return $element_selectors;
	}

	/**
	 * Generates style declarations for a node's features e.g., color, border,
	 * typography etc. that have custom selectors in their related block's
	 * metadata.
	 *
	 * @since 6.3.0
	 *
	 * @param object $metadata The related block metadata containing selectors.
	 * @param object $node     A merged theme.json node for block or variation.
	 * @return array The style declarations for the node's features with custom
	 *               selectors.
	 */
	protected function get_feature_declarations_for_node( $metadata, &$node ) {
		$declarations = array();

		if ( ! isset( $metadata['selectors'] ) ) {
			return $declarations;
		}

		$settings = $this->theme_json['settings'] ?? array();

		foreach ( $metadata['selectors'] as $feature => $feature_selectors ) {
			/*
			 * Skip if this is the block's root selector, the custom CSS
			 * selector, or the block doesn't have any styles for the feature.
			 */
			if ( 'root' === $feature || 'css' === $feature || empty( $node[ $feature ] ) ) {
				continue;
			}

			if ( is_array( $feature_selectors ) ) {
				foreach ( $feature_selectors as $subfeature => $subfeature_selector ) {
					if ( 'root' === $subfeature || empty( $node[ $feature ][ $subfeature ] ) ) {
						continue;
					}

					/*
					 * Create temporary node containing only the subfeature data
					 * to leverage existing `compute_style_properties` function.
					 */
					$subfeature_node = array(
						$feature => array(
							$subfeature => $node[ $feature ][ $subfeature ],
						),
					);

					// Generate style declarations.
					$new_declarations = static::compute_style_properties( $subfeature_node, $settings, null, $this->theme_json );

					// Merge subfeature declarations into feature declarations.
					if ( isset( $declarations[ $subfeature_selector ] ) ) {
						foreach ( $new_declarations as $new_declaration ) {
							$declarations[ $subfeature_selector ][] = $new_declaration;
						}
					} else {
						$declarations[ $subfeature_selector ] = $new_declarations;
					}

					/*
					 * Remove the subfeature from the block's node now its
					 * styles will be included under its own selector not the
					 * block's.
					 */
					unset( $node[ $feature ][ $subfeature ] );
				}
			}

			/*
			 * Now subfeatures have been processed and removed we can process
			 * feature root selector or simple string selector.
			 */
			if (
				is_string( $feature_selectors ) ||
				( isset( $feature_selectors['root'] ) && $feature_selectors['root'] )
			) {
				$feature_selector = is_string( $feature_selectors ) ? $feature_selectors : $feature_selectors['root'];

				/*
				 * Create temporary node containing only the feature data
				 * to leverage existing `compute_style_properties` function.
				 */
				$feature_node = array( $feature => $node[ $feature ] );

				// Generate the style declarations.
				$new_declarations = static::compute_style_properties( $feature_node, $settings, null, $this->theme_json );

				/*
				 * Merge new declarations with any that already exist for
				 * the feature selector. This may occur when multiple block
				 * support features use the same custom selector.
				 */
				if ( isset( $declarations[ $feature_selector ] ) ) {
					foreach ( $new_declarations as $new_declaration ) {
						$declarations[ $feature_selector ][] = $new_declaration;
					}
				} else {
					$declarations[ $feature_selector ] = $new_declarations;
				}

				/*
				 * Remove the feature from the block's node now its styles
				 * will be included under its own selector not the block's.
				 */
				unset( $node[ $feature ] );
			}
		}

		return $declarations;
	}

	/**
	 * Replaces CSS variables with their values in place.
	 *
	 * @since 6.3.0
	 * @since 6.5.0 Check for empty style before processing its value.
	 *
	 * @param array $styles CSS declarations to convert.
	 * @param array $values key => value pairs to use for replacement.
	 * @return array
	 */
	private static function convert_variables_to_value( $styles, $values ) {
		foreach ( $styles as $key => $style ) {
			if ( empty( $style ) ) {
				continue;
			}

			if ( is_array( $style ) ) {
				$styles[ $key ] = self::convert_variables_to_value( $style, $values );
				continue;
			}

			if ( 0 <= strpos( $style, 'var(' ) ) {
				// find all the variables in the string in the form of var(--variable-name, fallback), with fallback in the second capture group.

				$has_matches = preg_match_all( '/var\(([^),]+)?,?\s?(\S+)?\)/', $style, $var_parts );

				if ( $has_matches ) {
					$resolved_style = $styles[ $key ];
					foreach ( $var_parts[1] as $index => $var_part ) {
						$key_in_values   = 'var(' . $var_part . ')';
						$rule_to_replace = $var_parts[0][ $index ]; // the css rule to replace e.g. var(--wp--preset--color--vivid-green-cyan).
						$fallback        = $var_parts[2][ $index ]; // the fallback value.
						$resolved_style  = str_replace(
							array(
								$rule_to_replace,
								$fallback,
							),
							array(
								$values[ $key_in_values ] ?? $rule_to_replace,
								$values[ $fallback ] ?? $fallback,
							),
							$resolved_style
						);
					}
					$styles[ $key ] = $resolved_style;
				}
			}
		}

		return $styles;
	}

	/**
	 * Resolves the values of CSS variables in the given styles.
	 *
	 * @since 6.3.0
	 *
	 * @param WP_Theme_JSON $theme_json The theme json resolver.
	 * @return WP_Theme_JSON The $theme_json with resolved variables.
	 */
	public static function resolve_variables( $theme_json ) {
		$settings    = $theme_json->get_settings();
		$styles      = $theme_json->get_raw_data()['styles'];
		$preset_vars = static::compute_preset_vars( $settings, static::VALID_ORIGINS );
		$theme_vars  = static::compute_theme_vars( $settings );
		$vars        = array_reduce(
			array_merge( $preset_vars, $theme_vars ),
			function ( $carry, $item ) {
				$name                    = $item['name'];
				$carry[ "var({$name})" ] = $item['value'];
				return $carry;
			},
			array()
		);

		$theme_json->theme_json['styles'] = self::convert_variables_to_value( $styles, $vars );
		return $theme_json;
	}

	/**
	 * Generates a selector for a block style variation.
	 *
	 * @since 6.5.0
	 *
	 * @param string $variation_name Name of the block style variation.
	 * @param string $block_selector CSS selector for the block.
	 * @return string Block selector with block style variation selector added to it.
	 */
	protected static function get_block_style_variation_selector( $variation_name, $block_selector ) {
		$variation_class = ".is-style-$variation_name";

		if ( ! $block_selector ) {
			return $variation_class;
		}

		$limit          = 1;
		$selector_parts = static::split_selector_list( $block_selector );
		$result         = array();

		/*
		 * Append the variation class to each selector's ancestor: the first
		 * run of characters before any combinator (whitespace) or pseudo-class
		 * (`:`). Only the first match is replaced.
		 *
		 * Examples ("custom" variation):
		 * - `.wp-block`              => `.wp-block.is-style-custom`
		 * - `.wp-block .inner`       => `.wp-block.is-style-custom .inner`
		 * - `.wp-block:where(.a .b)` => `.wp-block.is-style-custom:where(.a .b)`
		 * - `:where(.outer .inner)`  => `:where(.outer.is-style-custom .inner)`
		 */
		foreach ( $selector_parts as $part ) {
			$result[] = preg_replace_callback(
				'/[^\s:]+/',
				function ( $matches ) use ( $variation_class ) {
					return $matches[0] . $variation_class;
				},
				$part,
				$limit
			);
		}

		return implode( ', ', $result );
	}

	/**
	 * Applies a block style variation class to a feature selector.
	 *
	 * Feature selectors can target a different element than the block's root
	 * selector. For example, the Button block's root selector targets the inner
	 * link, while its dimensions width selector targets the outer wrapper. Apply
	 * the variation class directly to the selector that will receive the
	 * declarations instead of deriving it by subtracting the root selector from
	 * the feature selector.
	 *
	 * @since 7.0.0
	 *
	 * @param array  $style_variation Style variation metadata.
	 * @param string $feature_selector CSS selector for the feature.
	 * @return string Feature selector with block style variation selector added.
	 */
	protected static function get_block_style_variation_feature_selector( $style_variation, $feature_selector ) {
		$variation_path = $style_variation['path'] ?? array();
		$variation_name = $style_variation['name'] ?? ( is_array( $variation_path ) ? end( $variation_path ) : null );

		if ( ! $variation_name ) {
			return $style_variation['selector'] ?? $feature_selector;
		}

		$variation_class = ".is-style-$variation_name";
		$selector_parts  = static::split_selector_list( $feature_selector );
		$selector_parts  = array_map(
			static function ( $selector ) use ( $variation_class ) {
				$prefix = $variation_class . ' ';

				if ( str_starts_with( $selector, $prefix ) ) {
					return substr( $selector, strlen( $prefix ) );
				}

				return $selector;
			},
			$selector_parts
		);

		return static::get_block_style_variation_selector(
			$variation_name,
			implode( ', ', $selector_parts )
		);
	}

	/**
	 * Collects valid block style variations keyed by block type.
	 *
	 * @since 6.6.0
	 * @since 6.8.0 Added the `$blocks_metadata` parameter.
	 *
	 * @param array $blocks_metadata Optional. List of metadata per block. Default is the metadata for all blocks.
	 * @return array Valid block style variations by block type.
	 */
	protected static function get_valid_block_style_variations( $blocks_metadata = array() ) {
		$valid_variations = array();
		$blocks_metadata  = empty( $blocks_metadata ) ? static::get_blocks_metadata() : $blocks_metadata;
		foreach ( $blocks_metadata as $block_name => $block_meta ) {
			if ( ! isset( $block_meta['styleVariations'] ) ) {
				continue;
			}
			$valid_variations[ $block_name ] = array_keys( $block_meta['styleVariations'] );
		}

		return $valid_variations;
	}

	/**
	 * Extracts the block name from the block metadata path.
	 *
	 * @since 7.1.0
	 *
	 * @param array $block_metadata Block metadata.
	 * @return string|null The block name or null if not found.
	 */
	private static function get_block_name_from_metadata_path( $block_metadata ) {
		return $block_metadata['path'][2] ?? null;
	}
}
@return bool True if successful, false if not.
 */
function register_taxonomy_for_object_type( $taxonomy, $object_type ) {
	global $wp_taxonomies;

	if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) {
		return false;
	}

	if ( ! get_post_type_object( $object_type ) ) {
		return false;
	}

	if ( ! in_array( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true ) ) {
		$wp_taxonomies[ $taxonomy ]->object_type[] = $object_type;
	}

	// Filter out empties.
	$wp_taxonomies[ $taxonomy ]->object_type = array_filter( $wp_taxonomies[ $taxonomy ]->object_type );

	/**
	 * Fires after a taxonomy is registered for an object type.
	 *
	 * @since 5.1.0
	 *
	 * @param string $taxonomy    Taxonomy name.
	 * @param string $object_type Name of the object type.
	 */
	do_action( 'registered_taxonomy_for_object_type', $taxonomy, $object_type );

	return true;
}

/**
 * Removes an already registered taxonomy from an object type.
 *
 * @since 3.7.0
 *
 * @global WP_Taxonomy[] $wp_taxonomies The registered taxonomies.
 *
 * @param string $taxonomy    Name of taxonomy object.
 * @param string $object_type Name of the object type.
 * @return bool True if successful, false if not.
 */
function unregister_taxonomy_for_object_type( $taxonomy, $object_type ) {
	global $wp_taxonomies;

	if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) {
		return false;
	}

	if ( ! get_post_type_object( $object_type ) ) {
		return false;
	}

	$key = array_search( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true );
	if ( false === $key ) {
		return false;
	}

	unset( $wp_taxonomies[ $taxonomy ]->object_type[ $key ] );

	/**
	 * Fires after a taxonomy is unregistered for an object type.
	 *
	 * @since 5.1.0
	 *
	 * @param string $taxonomy    Taxonomy name.
	 * @param string $object_type Name of the object type.
	 */
	do_action( 'unregistered_taxonomy_for_object_type', $taxonomy, $object_type );

	return true;
}

//
// Term API.
//

/**
 * Retrieves object IDs of valid taxonomy and term.
 *
 * The strings of `$taxonomies` must exist before this function will continue.
 * On failure of finding a valid taxonomy, it will return a WP_Error.
 *
 * The `$terms` aren't checked the same as `$taxonomies`, but still need to exist
 * for object IDs to be returned.
 *
 * It is possible to change the order that object IDs are returned by using `$args`
 * with either ASC or DESC array. The value should be in the key named 'order'.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int|int[]       $term_ids   Term ID or array of term IDs of terms that will be used.
 * @param string|string[] $taxonomies String of taxonomy name or Array of string values of taxonomy names.
 * @param array|string    $args       {
 *     Change the order of the object IDs.
 *
 *     @type string $order Order to retrieve terms. Accepts 'ASC' or 'DESC'. Default 'ASC'.
 * }
 * @return string[]|WP_Error An array of object IDs as numeric strings on success,
 *                           WP_Error if the taxonomy does not exist.
 */
function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) {
	global $wpdb;

	if ( ! is_array( $term_ids ) ) {
		$term_ids = array( $term_ids );
	}
	if ( ! is_array( $taxonomies ) ) {
		$taxonomies = array( $taxonomies );
	}
	foreach ( (array) $taxonomies as $taxonomy ) {
		if ( ! taxonomy_exists( $taxonomy ) ) {
			return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
		}
	}

	$defaults = array( 'order' => 'ASC' );
	$args     = wp_parse_args( $args, $defaults );

	$order = ( 'desc' === strtolower( $args['order'] ) ) ? 'DESC' : 'ASC';

	$term_ids = array_map( 'intval', $term_ids );

	$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
	$term_ids   = "'" . implode( "', '", $term_ids ) . "'";

	$sql = "SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($term_ids) ORDER BY tr.object_id $order";

	$last_changed = wp_cache_get_last_changed( 'terms' );
	$cache_key    = 'get_objects_in_term:' . md5( $sql );
	$cache        = wp_cache_get_salted( $cache_key, 'term-queries', $last_changed );
	if ( false === $cache ) {
		$object_ids = $wpdb->get_col( $sql );
		wp_cache_set_salted( $cache_key, $object_ids, 'term-queries', $last_changed );
	} else {
		$object_ids = (array) $cache;
	}

	if ( ! $object_ids ) {
		return array();
	}
	return $object_ids;
}

/**
 * Given a taxonomy query, generates SQL to be appended to a main query.
 *
 * @since 3.1.0
 *
 * @see WP_Tax_Query
 *
 * @param array  $tax_query         A compact tax query
 * @param string $primary_table
 * @param string $primary_id_column
 * @return string[]
 */
function get_tax_sql( $tax_query, $primary_table, $primary_id_column ) {
	$tax_query_obj = new WP_Tax_Query( $tax_query );
	return $tax_query_obj->get_sql( $primary_table, $primary_id_column );
}

/**
 * Gets all term data from database by term ID.
 *
 * The usage of the get_term function is to apply filters to a term object. It
 * is possible to get a term object from the database before applying the
 * filters.
 *
 * $term ID must be part of $taxonomy, to get from the database. Failure, might
 * be able to be captured by the hooks. Failure would be the same value as $wpdb
 * returns for the get_row method.
 *
 * There are two hooks, one is specifically for each term, named 'get_term', and
 * the second is for the taxonomy name, 'term_$taxonomy'. Both hooks gets the
 * term object, and the taxonomy name as parameters. Both hooks are expected to
 * return a term object.
 *
 * {@see 'get_term'} hook - Takes two parameters the term Object and the taxonomy name.
 * Must return term object. Used in get_term() as a catch-all filter for every
 * $term.
 *
 * {@see 'get_$taxonomy'} hook - Takes two parameters the term Object and the taxonomy
 * name. Must return term object. $taxonomy will be the taxonomy name, so for
 * example, if 'category', it would be 'get_category' as the filter name. Useful
 * for custom taxonomies or plugging into default taxonomies.
 *
 * @todo Better formatting for DocBlock
 *
 * @since 2.3.0
 * @since 4.4.0 Converted to return a WP_Term object if `$output` is `OBJECT`.
 *              The `$taxonomy` parameter was made optional.
 *
 * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
 *
 * @param int|WP_Term|object $term     If integer, term data will be fetched from the database,
 *                                     or from the cache if available.
 *                                     If stdClass object (as in the results of a database query),
 *                                     will apply filters and return a `WP_Term` object with the `$term` data.
 *                                     If `WP_Term`, will return `$term`.
 * @param string             $taxonomy Optional. Taxonomy name that `$term` is part of.
 * @param string             $output   Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
 *                                     correspond to a WP_Term object, an associative array, or a numeric array,
 *                                     respectively. Default OBJECT.
 * @param string             $filter   Optional. How to sanitize term fields. Default 'raw'.
 * @return WP_Term|array|WP_Error|null WP_Term instance (or array) on success, depending on the `$output` value.
 *                                     WP_Error if `$taxonomy` does not exist. Null for miscellaneous failure.
 */
function get_term( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {
	if ( empty( $term ) ) {
		return new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
	}

	if ( $taxonomy && ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	if ( $term instanceof WP_Term ) {
		$_term = $term;
	} elseif ( is_object( $term ) ) {
		if ( empty( $term->filter ) || 'raw' === $term->filter ) {
			$_term = sanitize_term( $term, $taxonomy, 'raw' );
			$_term = new WP_Term( $_term );
		} else {
			$_term = WP_Term::get_instance( $term->term_id );
		}
	} else {
		$_term = WP_Term::get_instance( $term, $taxonomy );
	}

	if ( is_wp_error( $_term ) ) {
		return $_term;
	} elseif ( ! $_term ) {
		return null;
	}

	// Ensure for filters that this is not empty.
	$taxonomy = $_term->taxonomy;

	$old_term = $_term;
	/**
	 * Filters a taxonomy term object.
	 *
	 * The {@see 'get_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 4.4.0 `$_term` is now a WP_Term object.
	 *
	 * @param WP_Term $_term    Term object.
	 * @param string  $taxonomy The taxonomy slug.
	 */
	$_term = apply_filters( 'get_term', $_term, $taxonomy );

	/**
	 * Filters a taxonomy term object.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers
	 * to the slug of the term's taxonomy.
	 *
	 * Possible hook names include:
	 *
	 *  - `get_category`
	 *  - `get_post_tag`
	 *
	 * @since 2.3.0
	 * @since 4.4.0 `$_term` is now a WP_Term object.
	 *
	 * @param WP_Term $_term    Term object.
	 * @param string  $taxonomy The taxonomy slug.
	 */
	$_term = apply_filters( "get_{$taxonomy}", $_term, $taxonomy );

	// Bail if a filter callback has changed the type of the `$_term` object.
	if ( ! ( $_term instanceof WP_Term ) ) {
		return $_term;
	}

	// Sanitize term, according to the specified filter.
	if ( $_term !== $old_term || $_term->filter !== $filter ) {
		$_term->filter( $filter );
	}

	if ( ARRAY_A === $output ) {
		return $_term->to_array();
	} elseif ( ARRAY_N === $output ) {
		return array_values( $_term->to_array() );
	}

	return $_term;
}

/**
 * Gets all term data from database by term field and data.
 *
 * Warning: $value is not escaped for 'name' $field. You must do it yourself, if
 * required.
 *
 * The default $field is 'id', therefore it is possible to also use null for
 * field, but not recommended that you do so.
 *
 * If $value does not exist, the return value will be false. If $taxonomy exists
 * and $field and $value combinations exist, the term will be returned.
 *
 * This function will always return the first term that matches the `$field`-
 * `$value`-`$taxonomy` combination specified in the parameters. If your query
 * is likely to match more than one term (as is likely to be the case when
 * `$field` is 'name', for example), consider using get_terms() instead; that
 * way, you will get all matching terms, and can provide your own logic for
 * deciding which one was intended.
 *
 * @todo Better formatting for DocBlock.
 *
 * @since 2.3.0
 * @since 4.4.0 `$taxonomy` is optional if `$field` is 'term_taxonomy_id'. Converted to return
 *              a WP_Term object if `$output` is `OBJECT`.
 * @since 5.5.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
 *
 * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param.
 *
 * @param string     $field    Either 'slug', 'name', 'term_id' (or 'id', 'ID'), or 'term_taxonomy_id'.
 * @param string|int $value    Search for this term value.
 * @param string     $taxonomy Taxonomy name. Optional, if `$field` is 'term_taxonomy_id'.
 * @param string     $output   Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which
 *                             correspond to a WP_Term object, an associative array, or a numeric array,
 *                             respectively. Default OBJECT.
 * @param string     $filter   Optional. How to sanitize term fields. Default 'raw'.
 * @return WP_Term|array|false WP_Term instance (or array) on success, depending on the `$output` value.
 *                             False if `$taxonomy` does not exist or `$term` was not found.
 */
function get_term_by( $field, $value, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) {

	// 'term_taxonomy_id' lookups don't require taxonomy checks.
	if ( 'term_taxonomy_id' !== $field && ! taxonomy_exists( $taxonomy ) ) {
		return false;
	}

	// No need to perform a query for empty 'slug' or 'name'.
	if ( 'slug' === $field || 'name' === $field ) {
		$value = (string) $value;

		if ( 0 === strlen( $value ) ) {
			return false;
		}
	}

	if ( 'id' === $field || 'ID' === $field || 'term_id' === $field ) {
		$term = get_term( (int) $value, $taxonomy, $output, $filter );
		if ( is_wp_error( $term ) || null === $term ) {
			$term = false;
		}
		return $term;
	}

	$args = array(
		'get'                    => 'all',
		'number'                 => 1,
		'taxonomy'               => $taxonomy,
		'update_term_meta_cache' => false,
		'orderby'                => 'none',
		'suppress_filter'        => true,
	);

	switch ( $field ) {
		case 'slug':
			$args['slug'] = $value;
			break;
		case 'name':
			$args['name'] = $value;
			break;
		case 'term_taxonomy_id':
			$args['term_taxonomy_id'] = $value;
			unset( $args['taxonomy'] );
			break;
		default:
			return false;
	}

	$terms = get_terms( $args );
	if ( is_wp_error( $terms ) || empty( $terms ) ) {
		return false;
	}

	$term = array_shift( $terms );

	// In the case of 'term_taxonomy_id', override the provided `$taxonomy` with whatever we find in the DB.
	if ( 'term_taxonomy_id' === $field ) {
		$taxonomy = $term->taxonomy;
	}

	return get_term( $term, $taxonomy, $output, $filter );
}

/**
 * Merges all term children into a single array of their IDs.
 *
 * This recursive function will merge all of the children of $term into the same
 * array of term IDs. Only useful for taxonomies which are hierarchical.
 *
 * Will return an empty array if $term does not exist in $taxonomy.
 *
 * @since 2.3.0
 *
 * @param int    $term_id  ID of term to get children.
 * @param string $taxonomy Taxonomy name.
 * @return array|WP_Error List of term IDs. WP_Error returned if `$taxonomy` does not exist.
 */
function get_term_children( $term_id, $taxonomy ) {
	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	$term_id = (int) $term_id;

	$terms = _get_term_hierarchy( $taxonomy );

	if ( ! isset( $terms[ $term_id ] ) ) {
		return array();
	}

	$children = $terms[ $term_id ];

	foreach ( (array) $terms[ $term_id ] as $child ) {
		if ( $term_id === $child ) {
			continue;
		}

		if ( isset( $terms[ $child ] ) ) {
			$children = array_merge( $children, get_term_children( $child, $taxonomy ) );
		}
	}

	return $children;
}

/**
 * Gets sanitized term field.
 *
 * The function is for contextual reasons and for simplicity of usage.
 *
 * @since 2.3.0
 * @since 4.4.0 The `$taxonomy` parameter was made optional. `$term` can also now accept a WP_Term object.
 *
 * @see sanitize_term_field()
 *
 * @param string      $field    Term field to fetch.
 * @param int|WP_Term $term     Term ID or object.
 * @param string      $taxonomy Optional. Taxonomy name. Default empty.
 * @param string      $context  Optional. How to sanitize term fields. Look at sanitize_term_field() for available options.
 *                              Default 'display'.
 * @return string|int|null|WP_Error Will return an empty string if $term is not an object or if $field is not set in $term.
 */
function get_term_field( $field, $term, $taxonomy = '', $context = 'display' ) {
	$term = get_term( $term, $taxonomy );
	if ( is_wp_error( $term ) ) {
		return $term;
	}

	if ( ! is_object( $term ) ) {
		return '';
	}

	if ( ! isset( $term->$field ) ) {
		return '';
	}

	return sanitize_term_field( $field, $term->$field, $term->term_id, $term->taxonomy, $context );
}

/**
 * Sanitizes term for editing.
 *
 * Return value is sanitize_term() and usage is for sanitizing the term for
 * editing. Function is for contextual and simplicity.
 *
 * @since 2.3.0
 *
 * @param int|object $id       Term ID or object.
 * @param string     $taxonomy Taxonomy name.
 * @return string|int|null|WP_Error Will return empty string if $term is not an object.
 */
function get_term_to_edit( $id, $taxonomy ) {
	$term = get_term( $id, $taxonomy );

	if ( is_wp_error( $term ) ) {
		return $term;
	}

	if ( ! is_object( $term ) ) {
		return '';
	}

	return sanitize_term( $term, $taxonomy, 'edit' );
}

/**
 * Retrieves the terms in a given taxonomy or list of taxonomies.
 *
 * You can fully inject any customizations to the query before it is sent, as
 * well as control the output with a filter.
 *
 * The return type varies depending on the value passed to `$args['fields']`. See
 * WP_Term_Query::get_terms() for details. In all cases, a `WP_Error` object will
 * be returned if an invalid taxonomy is requested.
 *
 * The {@see 'get_terms'} filter will be called when the cache has the term and will
 * pass the found term along with the array of $taxonomies and array of $args.
 * This filter is also called before the array of terms is passed and will pass
 * the array of terms, along with the $taxonomies and $args.
 *
 * The {@see 'list_terms_exclusions'} filter passes the compiled exclusions along with
 * the $args.
 *
 * The {@see 'get_terms_orderby'} filter passes the `ORDER BY` clause for the query
 * along with the $args array.
 *
 * Taxonomy or an array of taxonomies should be passed via the 'taxonomy' argument
 * in the `$args` array:
 *
 *     $terms = get_terms( array(
 *         'taxonomy'   => 'post_tag',
 *         'hide_empty' => false,
 *     ) );
 *
 * Prior to 4.5.0, taxonomy was passed as the first parameter of `get_terms()`.
 *
 * {@internal The `$deprecated` parameter is parsed for backward compatibility only.}
 *
 * @since 2.3.0
 * @since 4.2.0 Introduced 'name' and 'childless' parameters.
 * @since 4.4.0 Introduced the ability to pass 'term_id' as an alias of 'id' for the `orderby` parameter.
 *              Introduced the 'meta_query' and 'update_term_meta_cache' parameters. Converted to return
 *              a list of WP_Term objects.
 * @since 4.5.0 Changed the function signature so that the `$args` array can be provided as the first parameter.
 *              Introduced 'meta_key' and 'meta_value' parameters. Introduced the ability to order results by metadata.
 * @since 4.8.0 Introduced 'suppress_filter' parameter.
 *
 * @param array|string $args       Optional. Array or string of arguments. See WP_Term_Query::__construct()
 *                                 for information on accepted arguments. Default empty array.
 * @param array|string $deprecated Optional. Argument array, when using the legacy function parameter format.
 *                                 If present, this parameter will be interpreted as `$args`, and the first
 *                                 function parameter will be parsed as a taxonomy or array of taxonomies.
 *                                 Default empty.
 * @return WP_Term[]|int[]|string[]|string|WP_Error Array of terms, a count thereof as a numeric string,
 *                                                  or WP_Error if any of the taxonomies do not exist.
 *                                                  See the function description for more information.
 */
function get_terms( $args = array(), $deprecated = '' ) {
	$term_query = new WP_Term_Query();

	$defaults = array(
		'suppress_filter' => false,
	);

	/*
	 * Legacy argument format ($taxonomy, $args) takes precedence.
	 *
	 * We detect legacy argument format by checking if
	 * (a) a second non-empty parameter is passed, or
	 * (b) the first parameter shares no keys with the default array (ie, it's a list of taxonomies)
	 */
	$_args          = wp_parse_args( $args );
	$key_intersect  = array_intersect_key( $term_query->query_var_defaults, (array) $_args );
	$do_legacy_args = $deprecated || empty( $key_intersect );

	if ( $do_legacy_args ) {
		$taxonomies       = (array) $args;
		$args             = wp_parse_args( $deprecated, $defaults );
		$args['taxonomy'] = $taxonomies;
	} else {
		$args = wp_parse_args( $args, $defaults );
		if ( isset( $args['taxonomy'] ) ) {
			$args['taxonomy'] = (array) $args['taxonomy'];
		}
	}

	if ( ! empty( $args['taxonomy'] ) ) {
		foreach ( $args['taxonomy'] as $taxonomy ) {
			if ( ! taxonomy_exists( $taxonomy ) ) {
				return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
			}
		}
	}

	// Don't pass suppress_filter to WP_Term_Query.
	$suppress_filter = $args['suppress_filter'];
	unset( $args['suppress_filter'] );

	$terms = $term_query->query( $args );

	// Count queries are not filtered, for legacy reasons.
	if ( ! is_array( $terms ) ) {
		return $terms;
	}

	if ( $suppress_filter ) {
		return $terms;
	}

	/**
	 * Filters the found terms.
	 *
	 * @since 2.3.0
	 * @since 4.6.0 Added the `$term_query` parameter.
	 *
	 * @param array         $terms      Array of found terms.
	 * @param array|null    $taxonomies An array of taxonomies if known.
	 * @param array         $args       An array of get_terms() arguments.
	 * @param WP_Term_Query $term_query The WP_Term_Query object.
	 */
	return apply_filters( 'get_terms', $terms, $term_query->query_vars['taxonomy'], $term_query->query_vars, $term_query );
}

/**
 * Adds metadata to a term.
 *
 * For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
 *
 * @since 4.4.0
 *
 * @param int    $term_id    Term ID.
 * @param string $meta_key   Metadata name.
 * @param mixed  $meta_value Metadata value. Arrays and objects are stored as serialized data and
 *                           will be returned as the same type when retrieved. Other data types will
 *                           be stored as strings in the database:
 *                           - false is stored and retrieved as an empty string ('')
 *                           - true is stored and retrieved as '1'
 *                           - numbers (both integer and float) are stored and retrieved as strings
 *                           Must be serializable if non-scalar.
 * @param bool   $unique     Optional. Whether the same key should not be added.
 *                           Default false.
 * @return int|false|WP_Error Meta ID on success, false on failure.
 *                            WP_Error when term_id is ambiguous between taxonomies.
 */
function add_term_meta( $term_id, $meta_key, $meta_value, $unique = false ) {
	if ( wp_term_is_shared( $term_id ) ) {
		return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.' ), $term_id );
	}

	return add_metadata( 'term', $term_id, $meta_key, $meta_value, $unique );
}

/**
 * Removes metadata matching criteria from a term.
 *
 * For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
 *
 * @since 4.4.0
 *
 * @param int    $term_id    Term ID.
 * @param string $meta_key   Metadata name.
 * @param mixed  $meta_value Optional. Metadata value. If provided,
 *                           rows will only be removed that match the value.
 *                           Must be serializable if non-scalar. Default empty.
 * @return bool True on success, false on failure.
 */
function delete_term_meta( $term_id, $meta_key, $meta_value = '' ) {
	return delete_metadata( 'term', $term_id, $meta_key, $meta_value );
}

/**
 * Retrieves metadata for a term.
 *
 * @since 4.4.0
 *
 * @param int    $term_id Term ID.
 * @param string $key     Optional. The meta key to retrieve. By default,
 *                        returns data for all keys. Default empty.
 * @param bool   $single  Optional. Whether to return a single value.
 *                        This parameter has no effect if `$key` is not specified.
 *                        Default false.
 * @return mixed An array of values if `$single` is false.
 *               The value of the meta field if `$single` is true.
 *               False for an invalid `$term_id` (non-numeric, zero, or negative value).
 *               An empty array if a valid but non-existing term ID is passed and `$single` is false.
 *               An empty string if a valid but non-existing term ID is passed and `$single` is true.
 *               Note: Non-serialized values are returned as strings:
 *               - false values are returned as empty strings ('')
 *               - true values are returned as '1'
 *               - numbers are returned as strings
 *               Arrays and objects retain their original type.
 */
function get_term_meta( $term_id, $key = '', $single = false ) {
	return get_metadata( 'term', $term_id, $key, $single );
}

/**
 * Updates term metadata.
 *
 * Use the `$prev_value` parameter to differentiate between meta fields with the same key and term ID.
 *
 * If the meta field for the term does not exist, it will be added.
 *
 * For historical reasons both the meta key and the meta value are expected to be "slashed" (slashes escaped) on input.
 *
 * @since 4.4.0
 *
 * @param int    $term_id    Term ID.
 * @param string $meta_key   Metadata key.
 * @param mixed  $meta_value Metadata value. Must be serializable if non-scalar.
 * @param mixed  $prev_value Optional. Previous value to check before updating.
 *                           If specified, only update existing metadata entries with
 *                           this value. Otherwise, update all entries. Default empty.
 * @return int|bool|WP_Error Meta ID if the key didn't exist. true on successful update,
 *                           false on failure or if the value passed to the function
 *                           is the same as the one that is already in the database.
 *                           WP_Error when term_id is ambiguous between taxonomies.
 */
function update_term_meta( $term_id, $meta_key, $meta_value, $prev_value = '' ) {
	if ( wp_term_is_shared( $term_id ) ) {
		return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.' ), $term_id );
	}

	return update_metadata( 'term', $term_id, $meta_key, $meta_value, $prev_value );
}

/**
 * Updates metadata cache for list of term IDs.
 *
 * Performs SQL query to retrieve all metadata for the terms matching `$term_ids` and stores them in the cache.
 * Subsequent calls to `get_term_meta()` will not need to query the database.
 *
 * @since 4.4.0
 *
 * @param array $term_ids List of term IDs.
 * @return array|false An array of metadata on success, false if there is nothing to update.
 */
function update_termmeta_cache( $term_ids ) {
	return update_meta_cache( 'term', $term_ids );
}


/**
 * Queue term meta for lazy-loading.
 *
 * @since 6.3.0
 *
 * @param array $term_ids List of term IDs.
 */
function wp_lazyload_term_meta( array $term_ids ) {
	if ( empty( $term_ids ) ) {
		return;
	}
	$lazyloader = wp_metadata_lazyloader();
	$lazyloader->queue_objects( 'term', $term_ids );
}

/**
 * Gets all meta data, including meta IDs, for the given term ID.
 *
 * @since 4.9.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $term_id Term ID.
 * @return array|false Array with meta data, or false when the meta table is not installed.
 */
function has_term_meta( $term_id ) {
	$check = wp_check_term_meta_support_prefilter( null );
	if ( null !== $check ) {
		return $check;
	}

	global $wpdb;

	return $wpdb->get_results( $wpdb->prepare( "SELECT meta_key, meta_value, meta_id, term_id FROM $wpdb->termmeta WHERE term_id = %d ORDER BY meta_key,meta_id", $term_id ), ARRAY_A );
}

/**
 * Registers a meta key for terms.
 *
 * @since 4.9.8
 *
 * @param string $taxonomy Taxonomy to register a meta key for. Pass an empty string
 *                         to register the meta key across all existing taxonomies.
 * @param string $meta_key The meta key to register.
 * @param array  $args     Data used to describe the meta key when registered. See
 *                         {@see register_meta()} for a list of supported arguments.
 * @return bool True if the meta key was successfully registered, false if not.
 */
function register_term_meta( $taxonomy, $meta_key, array $args ) {
	$args['object_subtype'] = $taxonomy;

	return register_meta( 'term', $meta_key, $args );
}

/**
 * Unregisters a meta key for terms.
 *
 * @since 4.9.8
 *
 * @param string $taxonomy Taxonomy the meta key is currently registered for. Pass
 *                         an empty string if the meta key is registered across all
 *                         existing taxonomies.
 * @param string $meta_key The meta key to unregister.
 * @return bool True on success, false if the meta key was not previously registered.
 */
function unregister_term_meta( $taxonomy, $meta_key ) {
	return unregister_meta_key( 'term', $meta_key, $taxonomy );
}

/**
 * Determines whether a taxonomy term exists.
 *
 * Formerly is_term(), introduced in 2.3.0.
 *
 * For more information on this and similar theme functions, check out
 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
 * Conditional Tags} article in the Theme Developer Handbook.
 *
 * @since 3.0.0
 * @since 6.0.0 Converted to use `get_terms()`.
 *
 * @global bool $_wp_suspend_cache_invalidation
 *
 * @param int|string|null $term        The term to check. Accepts term ID, slug, or name.
 * @param string          $taxonomy    Optional. The taxonomy name to use.
 * @param int             $parent_term Optional. ID of parent term under which to confine the exists search.
 * @return mixed Returns null if the term does not exist.
 *               Returns the term ID if no taxonomy is specified and the term ID exists.
 *               Returns an array of the term ID and the term taxonomy ID if the taxonomy is specified and the pairing exists.
 *               Returns 0 if term ID 0 is passed to the function.
 *
 * @phpstan-return (
 *     $term is null ? null : (
 *         $term is 0 ? 0 : (
 *             $taxonomy is '' ? int|null : (
 *                 array{
 *                     term_id: numeric-string,
 *                     term_taxonomy_id: numeric-string,
 *                 }|null
 *             )
 *         )
 *     )
 * )
 */
function term_exists( $term, $taxonomy = '', $parent_term = null ) {
	global $_wp_suspend_cache_invalidation;

	if ( null === $term ) {
		return null;
	}

	$defaults = array(
		'get'                    => 'all',
		'fields'                 => 'ids',
		'number'                 => 1,
		'update_term_meta_cache' => false,
		'order'                  => 'ASC',
		'orderby'                => 'term_id',
		'suppress_filter'        => true,
	);

	// Ensure that while importing, queries are not cached.
	if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
		$defaults['cache_results'] = false;
	}

	if ( ! empty( $taxonomy ) ) {
		$defaults['taxonomy'] = $taxonomy;
		$defaults['fields']   = 'all';
	}

	/**
	 * Filters default query arguments for checking if a term exists.
	 *
	 * @since 6.0.0
	 *
	 * @param array      $defaults    An array of arguments passed to get_terms().
	 * @param int|string $term        The term to check. Accepts term ID, slug, or name.
	 * @param string     $taxonomy    The taxonomy name to use. An empty string indicates
	 *                                the search is against all taxonomies.
	 * @param int|null   $parent_term ID of parent term under which to confine the exists search.
	 *                                Null indicates the search is unconfined.
	 */
	$defaults = apply_filters( 'term_exists_default_query_args', $defaults, $term, $taxonomy, $parent_term );

	if ( ! empty( $taxonomy ) && is_numeric( $parent_term ) ) {
		$defaults['parent'] = (int) $parent_term;
	}

	if ( is_int( $term ) ) {
		if ( 0 === $term ) {
			return 0;
		}
		$args  = wp_parse_args( array( 'include' => array( $term ) ), $defaults );
		$terms = get_terms( $args );
	} else {
		$term = trim( wp_unslash( $term ) );
		if ( '' === $term ) {
			return null;
		}

		$args  = wp_parse_args( array( 'slug' => sanitize_title( $term ) ), $defaults );
		$terms = get_terms( $args );
		if ( empty( $terms ) || is_wp_error( $terms ) ) {
			$args  = wp_parse_args( array( 'name' => $term ), $defaults );
			$terms = get_terms( $args );
		}
	}

	if ( empty( $terms ) || is_wp_error( $terms ) ) {
		return null;
	}

	$_term = array_shift( $terms );

	if ( ! empty( $taxonomy ) ) {
		return array(
			'term_id'          => (string) $_term->term_id,
			'term_taxonomy_id' => (string) $_term->term_taxonomy_id,
		);
	}

	return (string) $_term;
}

/**
 * Checks if a term is an ancestor of another term.
 *
 * You can use either an ID or the term object for both parameters.
 *
 * @since 3.4.0
 *
 * @param int|object $term1    ID or object to check if this is the parent term.
 * @param int|object $term2    The child term.
 * @param string     $taxonomy Taxonomy name that $term1 and `$term2` belong to.
 * @return bool Whether `$term2` is a child of `$term1`.
 */
function term_is_ancestor_of( $term1, $term2, $taxonomy ) {
	if ( ! isset( $term1->term_id ) ) {
		$term1 = get_term( $term1, $taxonomy );
	}
	if ( ! isset( $term2->parent ) ) {
		$term2 = get_term( $term2, $taxonomy );
	}

	if ( empty( $term1->term_id ) || empty( $term2->parent ) ) {
		return false;
	}
	if ( $term2->parent === $term1->term_id ) {
		return true;
	}

	return term_is_ancestor_of( $term1, get_term( $term2->parent, $taxonomy ), $taxonomy );
}

/**
 * Sanitizes all term fields.
 *
 * Relies on sanitize_term_field() to sanitize the term. The difference is that
 * this function will sanitize **all** fields. The context is based
 * on sanitize_term_field().
 *
 * The `$term` is expected to be either an array or an object.
 *
 * @since 2.3.0
 *
 * @param array|object $term     The term to check.
 * @param string       $taxonomy The taxonomy name to use.
 * @param string       $context  Optional. Context in which to sanitize the term.
 *                               Accepts 'raw', 'edit', 'db', 'display', 'rss',
 *                               'attribute', or 'js'. Default 'display'.
 * @return array|object Term with all fields sanitized.
 */
function sanitize_term( $term, $taxonomy, $context = 'display' ) {
	$fields = array( 'term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group', 'term_taxonomy_id', 'object_id' );

	$do_object = is_object( $term );

	$term_id = $do_object ? ( $term->term_id ?? 0 ) : ( $term['term_id'] ?? 0 );

	foreach ( (array) $fields as $field ) {
		if ( $do_object ) {
			if ( isset( $term->$field ) ) {
				$term->$field = sanitize_term_field( $field, $term->$field, $term_id, $taxonomy, $context );
			}
		} else {
			if ( isset( $term[ $field ] ) ) {
				$term[ $field ] = sanitize_term_field( $field, $term[ $field ], $term_id, $taxonomy, $context );
			}
		}
	}

	if ( $do_object ) {
		$term->filter = $context;
	} else {
		$term['filter'] = $context;
	}

	return $term;
}

/**
 * Sanitizes the field value in the term based on the context.
 *
 * Passing a term field value through the function should be assumed to have
 * cleansed the value for whatever context the term field is going to be used.
 *
 * If no context or an unsupported context is given, then default filters will
 * be applied.
 *
 * There are enough filters for each context to support a custom filtering
 * without creating your own filter function. Simply create a function that
 * hooks into the filter you need.
 *
 * @since 2.3.0
 *
 * @param string $field    Term field to sanitize.
 * @param string $value    Search for this term value.
 * @param int    $term_id  Term ID.
 * @param string $taxonomy Taxonomy name.
 * @param string $context  Context in which to sanitize the term field.
 *                         Accepts 'raw', 'edit', 'db', 'display', 'rss',
 *                         'attribute', or 'js'.
 * @return mixed Sanitized field.
 */
function sanitize_term_field( $field, $value, $term_id, $taxonomy, $context ) {
	$int_fields = array( 'parent', 'term_id', 'count', 'term_group', 'term_taxonomy_id', 'object_id' );
	if ( in_array( $field, $int_fields, true ) ) {
		$value = (int) $value;
		if ( $value < 0 ) {
			$value = 0;
		}
	}

	$context = strtolower( $context );

	if ( 'raw' === $context ) {
		return $value;
	}

	if ( 'edit' === $context ) {

		/**
		 * Filters a term field to edit before it is sanitized.
		 *
		 * The dynamic portion of the hook name, `$field`, refers to the term field.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed $value     Value of the term field.
		 * @param int   $term_id   Term ID.
		 * @param string $taxonomy Taxonomy slug.
		 */
		$value = apply_filters( "edit_term_{$field}", $value, $term_id, $taxonomy );

		/**
		 * Filters the taxonomy field to edit before it is sanitized.
		 *
		 * The dynamic portions of the filter name, `$taxonomy` and `$field`, refer
		 * to the taxonomy slug and taxonomy field, respectively.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed $value   Value of the taxonomy field to edit.
		 * @param int   $term_id Term ID.
		 */
		$value = apply_filters( "edit_{$taxonomy}_{$field}", $value, $term_id );

		if ( 'description' === $field ) {
			$value = esc_html( $value ); // textarea_escaped
		} else {
			$value = esc_attr( $value );
		}
	} elseif ( 'db' === $context ) {

		/**
		 * Filters a term field value before it is sanitized.
		 *
		 * The dynamic portion of the hook name, `$field`, refers to the term field.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed  $value    Value of the term field.
		 * @param string $taxonomy Taxonomy slug.
		 */
		$value = apply_filters( "pre_term_{$field}", $value, $taxonomy );

		/**
		 * Filters a taxonomy field before it is sanitized.
		 *
		 * The dynamic portions of the filter name, `$taxonomy` and `$field`, refer
		 * to the taxonomy slug and field name, respectively.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed $value Value of the taxonomy field.
		 */
		$value = apply_filters( "pre_{$taxonomy}_{$field}", $value );

		// Back compat filters.
		if ( 'slug' === $field ) {
			/**
			 * Filters the category nicename before it is sanitized.
			 *
			 * Use the {@see 'pre_$taxonomy_$field'} hook instead.
			 *
			 * @since 2.0.3
			 *
			 * @param string $value The category nicename.
			 */
			$value = apply_filters( 'pre_category_nicename', $value );
		}
	} elseif ( 'rss' === $context ) {

		/**
		 * Filters the term field for use in RSS.
		 *
		 * The dynamic portion of the hook name, `$field`, refers to the term field.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed  $value    Value of the term field.
		 * @param string $taxonomy Taxonomy slug.
		 */
		$value = apply_filters( "term_{$field}_rss", $value, $taxonomy );

		/**
		 * Filters the taxonomy field for use in RSS.
		 *
		 * The dynamic portions of the hook name, `$taxonomy`, and `$field`, refer
		 * to the taxonomy slug and field name, respectively.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed $value Value of the taxonomy field.
		 */
		$value = apply_filters( "{$taxonomy}_{$field}_rss", $value );
	} else {
		// Use display filters by default.

		/**
		 * Filters the term field sanitized for display.
		 *
		 * The dynamic portion of the hook name, `$field`, refers to the term field name.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed  $value    Value of the term field.
		 * @param int    $term_id  Term ID.
		 * @param string $taxonomy Taxonomy slug.
		 * @param string $context  Context to retrieve the term field value.
		 */
		$value = apply_filters( "term_{$field}", $value, $term_id, $taxonomy, $context );

		/**
		 * Filters the taxonomy field sanitized for display.
		 *
		 * The dynamic portions of the filter name, `$taxonomy`, and `$field`, refer
		 * to the taxonomy slug and taxonomy field, respectively.
		 *
		 * @since 2.3.0
		 *
		 * @param mixed  $value   Value of the taxonomy field.
		 * @param int    $term_id Term ID.
		 * @param string $context Context to retrieve the taxonomy field value.
		 */
		$value = apply_filters( "{$taxonomy}_{$field}", $value, $term_id, $context );
	}

	if ( 'attribute' === $context ) {
		$value = esc_attr( $value );
	} elseif ( 'js' === $context ) {
		$value = esc_js( $value );
	}

	// Restore the type for integer fields after esc_attr().
	if ( in_array( $field, $int_fields, true ) ) {
		$value = (int) $value;
	}

	return $value;
}

/**
 * Counts how many terms are in taxonomy.
 *
 * Default $args is 'hide_empty' which can be 'hide_empty=true' or array('hide_empty' => true).
 *
 * {@internal The `$deprecated` parameter is parsed for backward compatibility only.}
 *
 * @since 2.3.0
 * @since 5.6.0 Changed the function signature so that the `$args` array can be provided as the first parameter.
 *
 * @param array|string $args       Optional. Array or string of arguments. See WP_Term_Query::__construct()
 *                                 for information on accepted arguments. Default empty array.
 * @param array|string $deprecated Optional. Argument array, when using the legacy function parameter format.
 *                                 If present, this parameter will be interpreted as `$args`, and the first
 *                                 function parameter will be parsed as a taxonomy or array of taxonomies.
 *                                 Default empty.
 * @return string|WP_Error Numeric string containing the number of terms in that
 *                         taxonomy or WP_Error if the taxonomy does not exist.
 */
function wp_count_terms( $args = array(), $deprecated = '' ) {
	$use_legacy_args = false;

	// Check whether function is used with legacy signature: `$taxonomy` and `$args`.
	if ( $args
		&& ( is_string( $args ) && taxonomy_exists( $args )
			|| is_array( $args ) && wp_is_numeric_array( $args ) )
	) {
		$use_legacy_args = true;
	}

	$defaults = array( 'hide_empty' => false );

	if ( $use_legacy_args ) {
		$defaults['taxonomy'] = $args;
		$args                 = $deprecated;
	}

	$args = wp_parse_args( $args, $defaults );

	// Backward compatibility.
	if ( isset( $args['ignore_empty'] ) ) {
		$args['hide_empty'] = $args['ignore_empty'];
		unset( $args['ignore_empty'] );
	}

	$args['fields'] = 'count';

	return get_terms( $args );
}

/**
 * Unlinks the object from the taxonomy or taxonomies.
 *
 * Will remove all relationships between the object and any terms in
 * a particular taxonomy or taxonomies. Does not remove the term or
 * taxonomy itself.
 *
 * @since 2.3.0
 *
 * @param int          $object_id  The term object ID that refers to the term.
 * @param string|array $taxonomies List of taxonomy names or single taxonomy name.
 */
function wp_delete_object_term_relationships( $object_id, $taxonomies ) {
	$object_id = (int) $object_id;

	if ( ! is_array( $taxonomies ) ) {
		$taxonomies = array( $taxonomies );
	}

	foreach ( (array) $taxonomies as $taxonomy ) {
		$term_ids = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids' ) );
		if ( ! is_array( $term_ids ) ) {
			// Skip return value in the case of an error or the 'wp_get_object_terms' filter returning an invalid value.
			continue;
		}
		$term_ids = array_map( 'intval', $term_ids );
		wp_remove_object_terms( $object_id, $term_ids, $taxonomy );
	}
}

/**
 * Removes a term from the database.
 *
 * If the term is a parent of other terms, then the children will be updated to
 * that term's parent.
 *
 * Metadata associated with the term will be deleted.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int          $term     Term ID.
 * @param string       $taxonomy Taxonomy name.
 * @param array|string $args {
 *     Optional. Array of arguments to override the default term ID. Default empty array.
 *
 *     @type int  $default       The term ID to make the default term. This will only override
 *                               the terms found if there is only one term found. Any other and
 *                               the found terms are used.
 *     @type bool $force_default Optional. Whether to force the supplied term as default to be
 *                               assigned even if the object was not going to be term-less.
 *                               Default false.
 * }
 * @return bool|int|WP_Error True on success, false if term does not exist. Zero on attempted
 *                           deletion of default Category. WP_Error if the taxonomy does not exist.
 * @phpstan-param non-empty-string $taxonomy
 * @phpstan-param string|array{
 *     default?: positive-int,
 *     force_default?: bool,
 * } $args
 * @phpstan-return bool|WP_Error|0
 */
function wp_delete_term( $term, $taxonomy, $args = array() ) {
	global $wpdb;

	$term = (int) $term;

	$ids = term_exists( $term, $taxonomy );
	if ( ! $ids ) {
		return false;
	}
	if ( is_wp_error( $ids ) ) {
		return $ids;
	}

	$tt_id = $ids['term_taxonomy_id'];

	$defaults = array();

	if ( 'category' === $taxonomy ) {
		$defaults['default'] = (int) get_option( 'default_category' );
		if ( $defaults['default'] === $term ) {
			return 0; // Don't delete the default category.
		}
	}

	// Don't delete the default custom taxonomy term.
	$taxonomy_object = get_taxonomy( $taxonomy );
	if ( ! empty( $taxonomy_object->default_term ) ) {
		$defaults['default'] = (int) get_option( 'default_term_' . $taxonomy );
		if ( $defaults['default'] === $term ) {
			return 0;
		}
	}

	$args = wp_parse_args( $args, $defaults );

	if ( isset( $args['default'] ) ) {
		$default = (int) $args['default'];
		if ( ! term_exists( $default, $taxonomy ) ) {
			unset( $default );
		}
	}

	if ( isset( $args['force_default'] ) ) {
		$force_default = $args['force_default'];
	}

	/**
	 * Fires when deleting a term, before any modifications are made to posts or terms.
	 *
	 * @since 4.1.0
	 *
	 * @param int    $term     Term ID.
	 * @param string $taxonomy Taxonomy name.
	 */
	do_action( 'pre_delete_term', $term, $taxonomy );

	// Update children to point to new parent.
	if ( is_taxonomy_hierarchical( $taxonomy ) ) {
		$term_obj = get_term( $term, $taxonomy );
		if ( is_wp_error( $term_obj ) ) {
			return $term_obj;
		}
		$parent = $term_obj->parent;

		$edit_ids    = $wpdb->get_results( "SELECT term_id, term_taxonomy_id FROM $wpdb->term_taxonomy WHERE `parent` = " . (int) $term_obj->term_id );
		$edit_tt_ids = wp_list_pluck( $edit_ids, 'term_taxonomy_id' );

		/**
		 * Fires immediately before a term to delete's children are reassigned a parent.
		 *
		 * @since 2.9.0
		 *
		 * @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
		 */
		do_action( 'edit_term_taxonomies', $edit_tt_ids );

		$wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id ) + compact( 'taxonomy' ) );

		// Clean the cache for all child terms.
		$edit_term_ids = wp_list_pluck( $edit_ids, 'term_id' );
		clean_term_cache( $edit_term_ids, $taxonomy );

		/**
		 * Fires immediately after a term to delete's children are reassigned a parent.
		 *
		 * @since 2.9.0
		 *
		 * @param array $edit_tt_ids An array of term taxonomy IDs for the given term.
		 */
		do_action( 'edited_term_taxonomies', $edit_tt_ids );
	}

	// Get the term before deleting it or its term relationships so we can pass to actions below.
	$deleted_term = get_term( $term, $taxonomy );

	$object_ids = (array) $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) );

	foreach ( $object_ids as $object_id ) {
		if ( ! isset( $default ) ) {
			wp_remove_object_terms( $object_id, $term, $taxonomy );
			continue;
		}

		$terms = wp_get_object_terms(
			$object_id,
			$taxonomy,
			array(
				'fields'  => 'ids',
				'orderby' => 'none',
			)
		);

		if ( 1 === count( $terms ) ) {
			$terms = array( $default );
		} else {
			$terms = array_diff( $terms, array( $term ) );
			if ( isset( $force_default ) && $force_default ) {
				$terms = array_merge( $terms, array( $default ) );
			}
		}

		$terms = array_map( 'intval', $terms );
		wp_set_object_terms( $object_id, $terms, $taxonomy );
	}

	// Clean the relationship caches for all object types using this term.
	$tax_object = get_taxonomy( $taxonomy );
	foreach ( $tax_object->object_type as $object_type ) {
		clean_object_term_cache( $object_ids, $object_type );
	}

	$term_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->termmeta WHERE term_id = %d ", $term ) );
	foreach ( $term_meta_ids as $mid ) {
		delete_metadata_by_mid( 'term', $mid );
	}

	/**
	 * Fires immediately before a term taxonomy ID is deleted.
	 *
	 * @since 2.9.0
	 *
	 * @param int $tt_id Term taxonomy ID.
	 */
	do_action( 'delete_term_taxonomy', $tt_id );

	$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );

	/**
	 * Fires immediately after a term taxonomy ID is deleted.
	 *
	 * @since 2.9.0
	 *
	 * @param int $tt_id Term taxonomy ID.
	 */
	do_action( 'deleted_term_taxonomy', $tt_id );

	// Delete the term if no taxonomies use it.
	if ( ! $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term ) ) ) {
		$wpdb->delete( $wpdb->terms, array( 'term_id' => $term ) );
	}

	clean_term_cache( $term, $taxonomy );

	/**
	 * Fires after a term is deleted from the database and the cache is cleaned.
	 *
	 * The {@see 'delete_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.5.0
	 * @since 4.5.0 Introduced the `$object_ids` argument.
	 *
	 * @param int     $term         Term ID.
	 * @param int     $tt_id        Term taxonomy ID.
	 * @param string  $taxonomy     Taxonomy slug.
	 * @param WP_Term $deleted_term Copy of the already-deleted term.
	 * @param array   $object_ids   List of term object IDs.
	 */
	do_action( 'delete_term', $term, $tt_id, $taxonomy, $deleted_term, $object_ids );

	/**
	 * Fires after a term in a specific taxonomy is deleted.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers to the specific
	 * taxonomy the term belonged to.
	 *
	 * Possible hook names include:
	 *
	 *  - `delete_category`
	 *  - `delete_post_tag`
	 *
	 * @since 2.3.0
	 * @since 4.5.0 Introduced the `$object_ids` argument.
	 *
	 * @param int     $term         Term ID.
	 * @param int     $tt_id        Term taxonomy ID.
	 * @param WP_Term $deleted_term Copy of the already-deleted term.
	 * @param array   $object_ids   List of term object IDs.
	 */
	do_action( "delete_{$taxonomy}", $term, $tt_id, $deleted_term, $object_ids );

	return true;
}

/**
 * Deletes one existing category.
 *
 * @since 2.0.0
 *
 * @param int $cat_id Category term ID.
 * @return bool|int|WP_Error Returns true if completes delete action; false if term doesn't exist;
 *                           Zero on attempted deletion of default Category; WP_Error object is
 *                           also a possibility.
 */
function wp_delete_category( $cat_id ) {
	return wp_delete_term( $cat_id, 'category' );
}

/**
 * Retrieves the terms associated with the given object(s), in the supplied taxonomies.
 *
 * @since 2.3.0
 * @since 4.2.0 Added support for 'taxonomy', 'parent', and 'term_taxonomy_id' values of `$orderby`.
 *              Introduced `$parent` argument.
 * @since 4.4.0 Introduced `$meta_query` and `$update_term_meta_cache` arguments. When `$fields` is 'all' or
 *              'all_with_object_id', an array of `WP_Term` objects will be returned.
 * @since 4.7.0 Refactored to use WP_Term_Query, and to support any WP_Term_Query arguments.
 * @since 6.3.0 Passing `update_term_meta_cache` argument value false by default resulting in get_terms() to not
 *              prime the term meta cache.
 *
 * @param int|int[]       $object_ids The ID(s) of the object(s) to retrieve.
 * @param string|string[] $taxonomies The taxonomy names to retrieve terms from.
 * @param array|string    $args       See WP_Term_Query::__construct() for supported arguments.
 * @return WP_Term[]|int[]|string[]|string|WP_Error Array of terms, a count thereof as a numeric string,
 *                                                  or WP_Error if any of the taxonomies do not exist.
 *                                                  See WP_Term_Query::get_terms() for more information.
 */
function wp_get_object_terms( $object_ids, $taxonomies, $args = array() ) {
	if ( empty( $object_ids ) || empty( $taxonomies ) ) {
		return array();
	}

	if ( ! is_array( $taxonomies ) ) {
		$taxonomies = array( $taxonomies );
	}

	foreach ( $taxonomies as $taxonomy ) {
		if ( ! taxonomy_exists( $taxonomy ) ) {
			return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
		}
	}

	if ( ! is_array( $object_ids ) ) {
		$object_ids = array( $object_ids );
	}
	$object_ids = array_map( 'intval', $object_ids );

	$defaults = array(
		'update_term_meta_cache' => false,
	);

	$args = wp_parse_args( $args, $defaults );

	/**
	 * Filters arguments for retrieving object terms.
	 *
	 * @since 4.9.0
	 *
	 * @param array    $args       An array of arguments for retrieving terms for the given object(s).
	 *                             See {@see wp_get_object_terms()} for details.
	 * @param int[]    $object_ids Array of object IDs.
	 * @param string[] $taxonomies Array of taxonomy names to retrieve terms from.
	 */
	$args = apply_filters( 'wp_get_object_terms_args', $args, $object_ids, $taxonomies );

	/*
	 * When one or more queried taxonomies is registered with an 'args' array,
	 * those params override the `$args` passed to this function.
	 */
	$terms = array();
	if ( count( $taxonomies ) > 1 ) {
		foreach ( $taxonomies as $index => $taxonomy ) {
			$t = get_taxonomy( $taxonomy );
			if ( isset( $t->args ) && is_array( $t->args ) && array_merge( $args, $t->args ) != $args ) {
				unset( $taxonomies[ $index ] );
				$terms = array_merge( $terms, wp_get_object_terms( $object_ids, $taxonomy, array_merge( $args, $t->args ) ) );
			}
		}
	} else {
		$t = get_taxonomy( $taxonomies[0] );
		if ( isset( $t->args ) && is_array( $t->args ) ) {
			$args = array_merge( $args, $t->args );
		}
	}

	$args['taxonomy']   = $taxonomies;
	$args['object_ids'] = $object_ids;

	// Taxonomies registered without an 'args' param are handled here.
	if ( ! empty( $taxonomies ) ) {
		$terms_from_remaining_taxonomies = get_terms( $args );

		// Array keys should be preserved for values of $fields that use term_id for keys.
		if ( ! empty( $args['fields'] ) && str_starts_with( $args['fields'], 'id=>' ) ) {
			$terms = $terms + $terms_from_remaining_taxonomies;
		} else {
			$terms = array_merge( $terms, $terms_from_remaining_taxonomies );
		}
	}

	/**
	 * Filters the terms for a given object or objects.
	 *
	 * @since 4.2.0
	 *
	 * @param WP_Term[]|int[]|string[]|string $terms      Array of terms or a count thereof as a numeric string.
	 * @param int[]                           $object_ids Array of object IDs for which terms were retrieved.
	 * @param string[]                        $taxonomies Array of taxonomy names from which terms were retrieved.
	 * @param array                           $args       Array of arguments for retrieving terms for the given
	 *                                                    object(s). See wp_get_object_terms() for details.
	 */
	$terms = apply_filters( 'get_object_terms', $terms, $object_ids, $taxonomies, $args );

	$object_ids = implode( ',', $object_ids );
	$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";

	/**
	 * Filters the terms for a given object or objects.
	 *
	 * The `$taxonomies` parameter passed to this filter is formatted as a SQL fragment. The
	 * {@see 'get_object_terms'} filter is recommended as an alternative.
	 *
	 * @since 2.8.0
	 *
	 * @param WP_Term[]|int[]|string[]|string $terms      Array of terms or a count thereof as a numeric string.
	 * @param string                          $object_ids Comma separated list of object IDs for which terms were retrieved.
	 * @param string                          $taxonomies SQL fragment of taxonomy names from which terms were retrieved.
	 * @param array                           $args       Array of arguments for retrieving terms for the given
	 *                                                    object(s). See wp_get_object_terms() for details.
	 */
	return apply_filters( 'wp_get_object_terms', $terms, $object_ids, $taxonomies, $args );
}

/**
 * Adds a new term to the database.
 *
 * A non-existent term is inserted in the following sequence:
 * 1. The term is added to the term table, then related to the taxonomy.
 * 2. If everything is correct, several actions are fired.
 * 3. The 'term_id_filter' is evaluated.
 * 4. The term cache is cleaned.
 * 5. Several more actions are fired.
 * 6. An array is returned containing the `term_id` and `term_taxonomy_id`.
 *
 * If the 'slug' argument is not empty, then it is checked to see if the term
 * is invalid. If it is not a valid, existing term, it is added and the term_id
 * is given.
 *
 * If the taxonomy is hierarchical, and the 'parent' argument is not empty,
 * the term is inserted and the term_id will be given.
 *
 * Error handling:
 * If `$taxonomy` does not exist or `$term` is empty,
 * a WP_Error object will be returned.
 *
 * If the term already exists on the same hierarchical level,
 * or the term slug and name are not unique, a WP_Error object will be returned.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @since 2.3.0
 *
 * @param string       $term     The term name to add.
 * @param string       $taxonomy The taxonomy to which to add the term.
 * @param array|string $args {
 *     Optional. Array or query string of arguments for inserting a term.
 *
 *     @type string $alias_of    Slug of the term to make this term an alias of.
 *                               Default empty string. Accepts a term slug.
 *     @type string $description The term description. Default empty string.
 *     @type int    $parent      The id of the parent term. Default 0.
 *     @type string $slug        The term slug to use. Default empty string.
 * }
 * @return array|WP_Error {
 *     An array of the new term data, WP_Error otherwise.
 *
 *     @type int        $term_id          The new term ID.
 *     @type int|string $term_taxonomy_id The new term taxonomy ID. Can be a numeric string.
 * }
 * @phpstan-param string|array{
 *     alias_of?: string,
 *     description?: string|null,
 *     parent?: non-negative-int,
 *     slug?: string|null,
 *     ...
 * } $args
 * @phpstan-return array{
 *     term_id: int,
 *     term_taxonomy_id: int|numeric-string,
 * }|WP_Error
 */
function wp_insert_term( $term, $taxonomy, $args = array() ) {
	global $wpdb;

	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	/**
	 * Filters a term before it is sanitized and inserted into the database.
	 *
	 * @since 3.0.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param string|WP_Error $term     The term name to add, or a WP_Error object if there's an error.
	 * @param string          $taxonomy Taxonomy slug.
	 * @param array|string    $args     Array or query string of arguments passed to wp_insert_term().
	 */
	$term = apply_filters( 'pre_insert_term', $term, $taxonomy, $args );

	if ( is_wp_error( $term ) ) {
		return $term;
	}

	if ( is_int( $term ) && 0 === $term ) {
		return new WP_Error( 'invalid_term_id', __( 'Invalid term ID.' ) );
	}

	if ( '' === trim( $term ) ) {
		return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) );
	}

	$defaults = array(
		'alias_of'    => '',
		'description' => '',
		'parent'      => 0,
		'slug'        => '',
	);
	$args     = wp_parse_args( $args, $defaults );

	if ( (int) $args['parent'] > 0 && ! term_exists( (int) $args['parent'] ) ) {
		return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
	}

	$args['name']     = $term;
	$args['taxonomy'] = $taxonomy;

	// Coerce null description to strings, to avoid database errors.
	$args['description'] = (string) $args['description'];

	$args = sanitize_term( $args, $taxonomy, 'db' );

	// expected_slashed ($name)
	$name        = wp_unslash( $args['name'] );
	$description = wp_unslash( $args['description'] );
	$parent      = (int) $args['parent'];

	// Sanitization could clean the name to an empty string that must be checked again.
	if ( '' === $name ) {
		return new WP_Error( 'invalid_term_name', __( 'Invalid term name.' ) );
	}

	$slug_provided = ! empty( $args['slug'] );
	if ( ! $slug_provided ) {
		$slug = sanitize_title( $name );
	} else {
		$slug = $args['slug'];
	}

	$term_group = 0;
	if ( $args['alias_of'] ) {
		$alias = get_term_by( 'slug', $args['alias_of'], $taxonomy );
		if ( ! empty( $alias->term_group ) ) {
			// The alias we want is already in a group, so let's use that one.
			$term_group = $alias->term_group;
		} elseif ( ! empty( $alias->term_id ) ) {
			/*
			 * The alias is not in a group, so we create a new one
			 * and add the alias to it.
			 */
			$term_group = $wpdb->get_var( "SELECT MAX(term_group) FROM $wpdb->terms" ) + 1;

			wp_update_term(
				$alias->term_id,
				$taxonomy,
				array(
					'term_group' => $term_group,
				)
			);
		}
	}

	/*
	 * Prevent the creation of terms with duplicate names at the same level of a taxonomy hierarchy,
	 * unless a unique slug has been explicitly provided.
	 */
	$name_matches = get_terms(
		array(
			'taxonomy'               => $taxonomy,
			'name'                   => $name,
			'hide_empty'             => false,
			'parent'                 => $args['parent'],
			'update_term_meta_cache' => false,
		)
	);

	/*
	 * The `name` match in `get_terms()` doesn't differentiate accented characters,
	 * so we do a stricter comparison here.
	 */
	$name_match = null;
	if ( $name_matches ) {
		foreach ( $name_matches as $_match ) {
			if ( strtolower( $name ) === strtolower( $_match->name ) ) {
				$name_match = $_match;
				break;
			}
		}
	}

	if ( $name_match ) {
		$slug_match = get_term_by( 'slug', $slug, $taxonomy );
		if ( ! $slug_provided || $name_match->slug === $slug || $slug_match ) {
			if ( is_taxonomy_hierarchical( $taxonomy ) ) {
				$siblings = get_terms(
					array(
						'taxonomy'               => $taxonomy,
						'get'                    => 'all',
						'parent'                 => $parent,
						'update_term_meta_cache' => false,
					)
				);

				$existing_term = null;
				$sibling_names = wp_list_pluck( $siblings, 'name' );
				$sibling_slugs = wp_list_pluck( $siblings, 'slug' );

				if ( ( ! $slug_provided || $name_match->slug === $slug ) && in_array( $name, $sibling_names, true ) ) {
					$existing_term = $name_match;
				} elseif ( $slug_match && in_array( $slug, $sibling_slugs, true ) ) {
					$existing_term = $slug_match;
				}

				if ( $existing_term ) {
					return new WP_Error( 'term_exists', __( 'A term with the name provided already exists with this parent.' ), $existing_term->term_id );
				}
			} else {
				return new WP_Error( 'term_exists', __( 'A term with the name provided already exists in this taxonomy.' ), $name_match->term_id );
			}
		}
	}

	$slug = wp_unique_term_slug( $slug, (object) $args );

	$data = compact( 'name', 'slug', 'term_group' );

	/**
	 * Filters term data before it is inserted into the database.
	 *
	 * @since 4.7.0
	 *
	 * @param array  $data     Term data to be inserted.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_insert_term().
	 */
	$data = apply_filters( 'wp_insert_term_data', $data, $taxonomy, $args );

	if ( false === $wpdb->insert( $wpdb->terms, $data ) ) {
		return new WP_Error( 'db_insert_error', __( 'Could not insert term into the database.' ), $wpdb->last_error );
	}

	$term_id = (int) $wpdb->insert_id;

	// Seems unreachable. However, is used in the case that a term name is provided, which sanitizes to an empty string.
	if ( empty( $slug ) ) {
		$slug = sanitize_title( $slug, $term_id );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edit_terms', $term_id, $taxonomy, $args );
		$wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edited_terms', $term_id, $taxonomy, $args );
	}

	/** @var numeric-string|null $tt_id */
	$tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) );

	if ( ! empty( $tt_id ) ) {
		return array(
			'term_id'          => $term_id,
			'term_taxonomy_id' => $tt_id,
		);
	}

	if ( false === $wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ) + array( 'count' => 0 ) ) ) {
		return new WP_Error( 'db_insert_error', __( 'Could not insert term taxonomy into the database.' ), $wpdb->last_error );
	}

	$tt_id = (int) $wpdb->insert_id;

	/*
	 * Confidence check: if we just created a term with the same parent + taxonomy + slug but a higher term_id than
	 * an existing term, then we have unwittingly created a duplicate term. Delete the dupe, and use the term_id
	 * and term_taxonomy_id of the older term instead. Then return out of the function so that the "create" hooks
	 * are not fired.
	 */
	$duplicate_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.term_id, t.slug, tt.term_taxonomy_id, tt.taxonomy FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON ( tt.term_id = t.term_id ) WHERE t.slug = %s AND tt.parent = %d AND tt.taxonomy = %s AND t.term_id < %d AND tt.term_taxonomy_id != %d", $slug, $parent, $taxonomy, $term_id, $tt_id ) );

	/**
	 * Filters the duplicate term check that takes place during term creation.
	 *
	 * Term parent + taxonomy + slug combinations are meant to be unique, and wp_insert_term()
	 * performs a last-minute confirmation of this uniqueness before allowing a new term
	 * to be created. Plugins with different uniqueness requirements may use this filter
	 * to bypass or modify the duplicate-term check.
	 *
	 * @since 5.1.0
	 *
	 * @param object $duplicate_term Duplicate term row from terms table, if found.
	 * @param string $term           Term being inserted.
	 * @param string $taxonomy       Taxonomy name.
	 * @param array  $args           Arguments passed to wp_insert_term().
	 * @param int    $tt_id          term_taxonomy_id for the newly created term.
	 */
	$duplicate_term = apply_filters( 'wp_insert_term_duplicate_term_check', $duplicate_term, $term, $taxonomy, $args, $tt_id );

	if ( $duplicate_term ) {
		$wpdb->delete( $wpdb->terms, array( 'term_id' => $term_id ) );
		$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) );

		$term_id = (int) $duplicate_term->term_id;
		$tt_id   = (int) $duplicate_term->term_taxonomy_id;

		clean_term_cache( $term_id, $taxonomy );
		return array(
			'term_id'          => $term_id,
			'term_taxonomy_id' => $tt_id,
		);
	}

	/**
	 * Fires immediately after a new term is created, before the term cache is cleaned.
	 *
	 * The {@see 'create_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_insert_term().
	 */
	do_action( 'create_term', $term_id, $tt_id, $taxonomy, $args );

	/**
	 * Fires after a new term is created for a specific taxonomy.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers
	 * to the slug of the taxonomy the term was created for.
	 *
	 * Possible hook names include:
	 *
	 *  - `create_category`
	 *  - `create_post_tag`
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param array $args    Arguments passed to wp_insert_term().
	 */
	do_action( "create_{$taxonomy}", $term_id, $tt_id, $args );

	/**
	 * Filters the term ID after a new term is created.
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param array $args    Arguments passed to wp_insert_term().
	 */
	$term_id = apply_filters( 'term_id_filter', $term_id, $tt_id, $args );

	clean_term_cache( $term_id, $taxonomy );

	/**
	 * Fires after a new term is created, and after the term cache has been cleaned.
	 *
	 * The {@see 'created_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_insert_term().
	 */
	do_action( 'created_term', $term_id, $tt_id, $taxonomy, $args );

	/**
	 * Fires after a new term in a specific taxonomy is created, and after the term
	 * cache has been cleaned.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
	 *
	 * Possible hook names include:
	 *
	 *  - `created_category`
	 *  - `created_post_tag`
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param array $args    Arguments passed to wp_insert_term().
	 */
	do_action( "created_{$taxonomy}", $term_id, $tt_id, $args );

	/**
	 * Fires after a term has been saved, and the term cache has been cleared.
	 *
	 * The {@see 'saved_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 5.5.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param bool   $update   Whether this is an existing term being updated.
	 * @param array  $args     Arguments passed to wp_insert_term().
	 */
	do_action( 'saved_term', $term_id, $tt_id, $taxonomy, false, $args );

	/**
	 * Fires after a term in a specific taxonomy has been saved, and the term
	 * cache has been cleared.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
	 *
	 * Possible hook names include:
	 *
	 *  - `saved_category`
	 *  - `saved_post_tag`
	 *
	 * @since 5.5.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param bool  $update  Whether this is an existing term being updated.
	 * @param array $args    Arguments passed to wp_insert_term().
	 */
	do_action( "saved_{$taxonomy}", $term_id, $tt_id, false, $args );

	return array(
		'term_id'          => $term_id,
		'term_taxonomy_id' => $tt_id,
	);
}

/**
 * Creates term and taxonomy relationships.
 *
 * Relates an object (post, link, etc.) to a term and taxonomy type. Creates the
 * term and taxonomy relationship if it doesn't already exist. Creates a term if
 * it doesn't exist (using the slug).
 *
 * A relationship means that the term is grouped in or belongs to the taxonomy.
 * A term has no meaning until it is given context by defining which taxonomy it
 * exists under.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int              $object_id The object to relate to.
 * @param string|int|array $terms     A single term slug, single term ID, or array of either term slugs or IDs.
 *                                    Will replace all existing related terms in this taxonomy. Passing an
 *                                    empty array will remove all related terms.
 * @param string           $taxonomy  The context in which to relate the term to the object.
 * @param bool             $append    Optional. If false will delete difference of terms. Default false.
 * @return array|WP_Error Term taxonomy IDs of the affected terms or WP_Error on failure.
 */
function wp_set_object_terms( $object_id, $terms, $taxonomy, $append = false ) {
	global $wpdb;

	$object_id = (int) $object_id;

	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	if ( empty( $terms ) ) {
		$terms = array();
	} elseif ( ! is_array( $terms ) ) {
		$terms = array( $terms );
	}

	if ( ! $append ) {
		$old_tt_ids = wp_get_object_terms(
			$object_id,
			$taxonomy,
			array(
				'fields'                 => 'tt_ids',
				'orderby'                => 'none',
				'update_term_meta_cache' => false,
			)
		);
	} else {
		$old_tt_ids = array();
	}

	$tt_ids     = array();
	$new_tt_ids = array();

	foreach ( (array) $terms as $term ) {
		if ( '' === trim( $term ) ) {
			continue;
		}

		$term_info = term_exists( $term, $taxonomy );

		if ( ! $term_info ) {
			// Skip if a non-existent term ID is passed.
			if ( is_int( $term ) ) {
				continue;
			}

			$term_info = wp_insert_term( $term, $taxonomy );
		}

		if ( is_wp_error( $term_info ) ) {
			return $term_info;
		}

		$tt_id    = $term_info['term_taxonomy_id'];
		$tt_ids[] = $tt_id;

		if ( $wpdb->get_var( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id = %d", $object_id, $tt_id ) ) ) {
			continue;
		}

		/**
		 * Fires immediately before an object-term relationship is added.
		 *
		 * @since 2.9.0
		 * @since 4.7.0 Added the `$taxonomy` parameter.
		 *
		 * @param int    $object_id Object ID.
		 * @param int    $tt_id     Term taxonomy ID.
		 * @param string $taxonomy  Taxonomy slug.
		 */
		do_action( 'add_term_relationship', $object_id, $tt_id, $taxonomy );

		$wpdb->insert(
			$wpdb->term_relationships,
			array(
				'object_id'        => $object_id,
				'term_taxonomy_id' => $tt_id,
			)
		);

		/**
		 * Fires immediately after an object-term relationship is added.
		 *
		 * @since 2.9.0
		 * @since 4.7.0 Added the `$taxonomy` parameter.
		 *
		 * @param int    $object_id Object ID.
		 * @param int    $tt_id     Term taxonomy ID.
		 * @param string $taxonomy  Taxonomy slug.
		 */
		do_action( 'added_term_relationship', $object_id, $tt_id, $taxonomy );

		$new_tt_ids[] = $tt_id;
	}

	if ( $new_tt_ids ) {
		wp_update_term_count( $new_tt_ids, $taxonomy );
	}

	if ( ! $append ) {
		$delete_tt_ids = array_diff( $old_tt_ids, $tt_ids );

		if ( $delete_tt_ids ) {
			$in_delete_tt_ids = "'" . implode( "', '", $delete_tt_ids ) . "'";
			$delete_term_ids  = $wpdb->get_col( $wpdb->prepare( "SELECT tt.term_id FROM $wpdb->term_taxonomy AS tt WHERE tt.taxonomy = %s AND tt.term_taxonomy_id IN ($in_delete_tt_ids)", $taxonomy ) );
			$delete_term_ids  = array_map( 'intval', $delete_term_ids );

			$remove = wp_remove_object_terms( $object_id, $delete_term_ids, $taxonomy );
			if ( is_wp_error( $remove ) ) {
				return $remove;
			}
		}
	}

	$t = get_taxonomy( $taxonomy );

	if ( ! $append && isset( $t->sort ) && $t->sort ) {
		$values     = array();
		$term_order = 0;

		$final_tt_ids = wp_get_object_terms(
			$object_id,
			$taxonomy,
			array(
				'fields'                 => 'tt_ids',
				'update_term_meta_cache' => false,
			)
		);

		foreach ( $tt_ids as $tt_id ) {
			if ( in_array( (int) $tt_id, $final_tt_ids, true ) ) {
				$values[] = $wpdb->prepare( '(%d, %d, %d)', $object_id, $tt_id, ++$term_order );
			}
		}

		if ( $values ) {
			if ( false === $wpdb->query( "INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES " . implode( ',', $values ) . ' ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)' ) ) {
				return new WP_Error( 'db_insert_error', __( 'Could not insert term relationship into the database.' ), $wpdb->last_error );
			}
		}
	}

	wp_cache_delete( $object_id, $taxonomy . '_relationships' );
	wp_cache_set_terms_last_changed();

	/**
	 * Fires after an object's terms have been set.
	 *
	 * @since 2.8.0
	 *
	 * @param int    $object_id  Object ID.
	 * @param array  $terms      An array of object term IDs or slugs.
	 * @param array  $tt_ids     An array of term taxonomy IDs.
	 * @param string $taxonomy   Taxonomy slug.
	 * @param bool   $append     Whether to append new terms to the old terms.
	 * @param array  $old_tt_ids Old array of term taxonomy IDs.
	 */
	do_action( 'set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids );

	return $tt_ids;
}

/**
 * Adds term(s) associated with a given object.
 *
 * @since 3.6.0
 *
 * @param int              $object_id The ID of the object to which the terms will be added.
 * @param string|int|array $terms     The slug(s) or ID(s) of the term(s) to add.
 * @param array|string     $taxonomy  Taxonomy name.
 * @return array|WP_Error Term taxonomy IDs of the affected terms.
 */
function wp_add_object_terms( $object_id, $terms, $taxonomy ) {
	return wp_set_object_terms( $object_id, $terms, $taxonomy, true );
}

/**
 * Removes term(s) associated with a given object.
 *
 * @since 3.6.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int              $object_id The ID of the object from which the terms will be removed.
 * @param string|int|array $terms     The slug(s) or ID(s) of the term(s) to remove.
 * @param string           $taxonomy  Taxonomy name.
 * @return bool|WP_Error True on success, false or WP_Error on failure.
 */
function wp_remove_object_terms( $object_id, $terms, $taxonomy ) {
	global $wpdb;

	$object_id = (int) $object_id;

	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	if ( ! is_array( $terms ) ) {
		$terms = array( $terms );
	}

	$tt_ids = array();

	foreach ( (array) $terms as $term ) {
		if ( '' === trim( $term ) ) {
			continue;
		}

		$term_info = term_exists( $term, $taxonomy );
		if ( ! $term_info ) {
			// Skip if a non-existent term ID is passed.
			if ( is_int( $term ) ) {
				continue;
			}
		}

		if ( is_wp_error( $term_info ) ) {
			return $term_info;
		}

		$tt_ids[] = $term_info['term_taxonomy_id'];
	}

	if ( $tt_ids ) {
		$in_tt_ids = "'" . implode( "', '", $tt_ids ) . "'";

		/**
		 * Fires immediately before an object-term relationship is deleted.
		 *
		 * @since 2.9.0
		 * @since 4.7.0 Added the `$taxonomy` parameter.
		 *
		 * @param int    $object_id Object ID.
		 * @param array  $tt_ids    An array of term taxonomy IDs.
		 * @param string $taxonomy  Taxonomy slug.
		 */
		do_action( 'delete_term_relationships', $object_id, $tt_ids, $taxonomy );

		$deleted = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id ) );

		wp_cache_delete( $object_id, $taxonomy . '_relationships' );
		wp_cache_set_terms_last_changed();

		/**
		 * Fires immediately after an object-term relationship is deleted.
		 *
		 * @since 2.9.0
		 * @since 4.7.0 Added the `$taxonomy` parameter.
		 *
		 * @param int    $object_id Object ID.
		 * @param array  $tt_ids    An array of term taxonomy IDs.
		 * @param string $taxonomy  Taxonomy slug.
		 */
		do_action( 'deleted_term_relationships', $object_id, $tt_ids, $taxonomy );

		wp_update_term_count( $tt_ids, $taxonomy );

		return (bool) $deleted;
	}

	return false;
}

/**
 * Makes term slug unique, if it isn't already.
 *
 * The `$slug` has to be unique global to every taxonomy, meaning that one
 * taxonomy term can't have a matching slug with another taxonomy term. Each
 * slug has to be globally unique for every taxonomy.
 *
 * The way this works is that if the taxonomy that the term belongs to is
 * hierarchical and has a parent, it will append that parent to the $slug.
 *
 * If that still doesn't return a unique slug, then it tries to append a number
 * until it finds a number that is truly unique.
 *
 * The only purpose for `$term` is for appending a parent, if one exists.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param string $slug The string that will be tried for a unique slug.
 * @param object $term The term object that the `$slug` will belong to.
 * @return string Will return a true unique slug.
 */
function wp_unique_term_slug( $slug, $term ) {
	global $wpdb;

	$needs_suffix  = true;
	$original_slug = $slug;

	// As of 4.1, duplicate slugs are allowed as long as they're in different taxonomies.
	if ( ! term_exists( $slug ) || get_option( 'db_version' ) >= 30133 && ! get_term_by( 'slug', $slug, $term->taxonomy ) ) {
		$needs_suffix = false;
	}

	/*
	 * If the taxonomy supports hierarchy and the term has a parent, make the slug unique
	 * by incorporating parent slugs.
	 */
	$parent_suffix = '';
	if ( $needs_suffix && is_taxonomy_hierarchical( $term->taxonomy ) && ! empty( $term->parent ) ) {
		$the_parent = $term->parent;
		while ( ! empty( $the_parent ) ) {
			$parent_term = get_term( $the_parent, $term->taxonomy );
			if ( is_wp_error( $parent_term ) || empty( $parent_term ) ) {
				break;
			}
			$parent_suffix .= '-' . $parent_term->slug;
			if ( ! term_exists( $slug . $parent_suffix ) ) {
				break;
			}

			if ( empty( $parent_term->parent ) ) {
				break;
			}
			$the_parent = $parent_term->parent;
		}
	}

	// If we didn't get a unique slug, try appending a number to make it unique.

	/**
	 * Filters whether the proposed unique term slug is bad.
	 *
	 * @since 4.3.0
	 *
	 * @param bool   $needs_suffix Whether the slug needs to be made unique with a suffix.
	 * @param string $slug         The slug.
	 * @param object $term         Term object.
	 */
	if ( apply_filters( 'wp_unique_term_slug_is_bad_slug', $needs_suffix, $slug, $term ) ) {
		if ( $parent_suffix ) {
			$slug .= $parent_suffix;
		}

		if ( ! empty( $term->term_id ) ) {
			$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $term->term_id );
		} else {
			$query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug );
		}

		if ( $wpdb->get_var( $query ) ) { // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
			$num = 2;
			do {
				$alt_slug = $slug . "-$num";
				++$num;
				$slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) );
			} while ( $slug_check );
			$slug = $alt_slug;
		}
	}

	/**
	 * Filters the unique term slug.
	 *
	 * @since 4.3.0
	 *
	 * @param string $slug          Unique term slug.
	 * @param object $term          Term object.
	 * @param string $original_slug Slug originally passed to the function for testing.
	 */
	return apply_filters( 'wp_unique_term_slug', $slug, $term, $original_slug );
}

/**
 * Updates term based on arguments provided.
 *
 * The `$args` will indiscriminately override all values with the same field name.
 * Care must be taken to not override important information need to update or
 * update will fail (or perhaps create a new term, neither would be acceptable).
 *
 * Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not
 * defined in `$args` already.
 *
 * 'alias_of' will create a term group, if it doesn't already exist, and
 * update it for the `$term`.
 *
 * If the 'slug' argument in `$args` is missing, then the 'name' will be used.
 * If you set 'slug' and it isn't unique, then a WP_Error is returned.
 * If you don't pass any slug, then a unique one will be created.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int          $term_id  The ID of the term.
 * @param string       $taxonomy The taxonomy of the term.
 * @param array        $args {
 *     Optional. Array of arguments for updating a term.
 *
 *     @type string $alias_of    Slug of the term to make this term an alias of.
 *                               Default empty string. Accepts a term slug.
 *     @type string $description The term description. Default empty string.
 *     @type int    $parent      The id of the parent term. Default 0.
 *     @type string $slug        The term slug to use. Default empty string.
 * }
 * @return array|WP_Error An array containing the `term_id` and `term_taxonomy_id`,
 *                        WP_Error otherwise.
 * @phpstan-param array{
 *     alias_of?: string,
 *     description?: string,
 *     parent?: non-negative-int,
 *     slug?: string|null,
 *     ...
 * } $args
 * @phpstan-return array{
 *     term_id: int,
 *     term_taxonomy_id: int,
 * }|WP_Error
 */
function wp_update_term( $term_id, $taxonomy, $args = array() ) {
	global $wpdb;

	if ( ! taxonomy_exists( $taxonomy ) ) {
		return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) );
	}

	$term_id = (int) $term_id;

	// First, get all of the original args.
	$term = get_term( $term_id, $taxonomy );

	if ( is_wp_error( $term ) ) {
		return $term;
	}

	if ( ! $term ) {
		return new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
	}

	$term = (array) $term->data;

	// Escape data pulled from DB.
	$term = wp_slash( $term );

	// Merge old and new args with new args overwriting old ones.
	$args = array_merge( $term, $args );

	$defaults    = array(
		'alias_of'    => '',
		'description' => '',
		'parent'      => 0,
		'slug'        => '',
	);
	$args        = wp_parse_args( $args, $defaults );
	$args        = sanitize_term( $args, $taxonomy, 'db' );
	$parsed_args = $args;

	// expected_slashed ($name)
	$name        = wp_unslash( $args['name'] );
	$description = wp_unslash( $args['description'] );

	$parsed_args['name']        = $name;
	$parsed_args['description'] = $description;

	if ( '' === trim( $name ) ) {
		return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) );
	}

	if ( (int) $parsed_args['parent'] > 0 && ! term_exists( (int) $parsed_args['parent'] ) ) {
		return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) );
	}

	$empty_slug = false;
	if ( empty( $args['slug'] ) ) {
		$empty_slug = true;
		$slug       = sanitize_title( $name );
	} else {
		$slug = $args['slug'];
	}

	$parsed_args['slug'] = $slug;

	$term_group = $parsed_args['term_group'] ?? 0;
	if ( $args['alias_of'] ) {
		$alias = get_term_by( 'slug', $args['alias_of'], $taxonomy );
		if ( ! empty( $alias->term_group ) ) {
			// The alias we want is already in a group, so let's use that one.
			$term_group = $alias->term_group;
		} elseif ( ! empty( $alias->term_id ) ) {
			/*
			 * The alias is not in a group, so we create a new one
			 * and add the alias to it.
			 */
			$term_group = $wpdb->get_var( "SELECT MAX(term_group) FROM $wpdb->terms" ) + 1;

			wp_update_term(
				$alias->term_id,
				$taxonomy,
				array(
					'term_group' => $term_group,
				)
			);
		}

		$parsed_args['term_group'] = $term_group;
	}

	/**
	 * Filters the term parent.
	 *
	 * Hook to this filter to see if it will cause a hierarchy loop.
	 *
	 * @since 3.1.0
	 *
	 * @param int    $parent_term ID of the parent term.
	 * @param int    $term_id     Term ID.
	 * @param string $taxonomy    Taxonomy slug.
	 * @param array  $parsed_args An array of potentially altered update arguments for the given term.
	 * @param array  $args        Arguments passed to wp_update_term().
	 */
	$parent = (int) apply_filters( 'wp_update_term_parent', $args['parent'], $term_id, $taxonomy, $parsed_args, $args );

	// Check for duplicate slug.
	$duplicate = get_term_by( 'slug', $slug, $taxonomy );
	if ( $duplicate && $duplicate->term_id !== $term_id ) {
		/*
		 * If an empty slug was passed or the parent changed, reset the slug to something unique.
		 * Otherwise, bail.
		 */
		if ( $empty_slug || ( $parent !== (int) $term['parent'] ) ) {
			$slug = wp_unique_term_slug( $slug, (object) $args );
		} else {
			/* translators: %s: Taxonomy term slug. */
			return new WP_Error( 'duplicate_term_slug', sprintf( __( 'The slug &#8220;%s&#8221; is already in use by another term.' ), $slug ) );
		}
	}

	$tt_id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) );

	// Check whether this is a shared term that needs splitting.
	$_term_id = _split_shared_term( $term_id, $tt_id );
	if ( ! is_wp_error( $_term_id ) ) {
		$term_id = $_term_id;
	}

	/**
	 * Fires immediately before the given terms are edited.
	 *
	 * @since 2.9.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edit_terms', $term_id, $taxonomy, $args );

	$data = compact( 'name', 'slug', 'term_group' );

	/**
	 * Filters term data before it is updated in the database.
	 *
	 * @since 4.7.0
	 *
	 * @param array  $data     Term data to be updated.
	 * @param int    $term_id  Term ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	$data = apply_filters( 'wp_update_term_data', $data, $term_id, $taxonomy, $args );

	$wpdb->update( $wpdb->terms, $data, compact( 'term_id' ) );

	if ( empty( $slug ) ) {
		$slug = sanitize_title( $name, $term_id );
		$wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) );
	}

	/**
	 * Fires immediately after a term is updated in the database, but before its
	 * term-taxonomy relationship is updated.
	 *
	 * @since 2.9.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edited_terms', $term_id, $taxonomy, $args );

	/**
	 * Fires immediate before a term-taxonomy relationship is updated.
	 *
	 * @since 2.9.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edit_term_taxonomy', $tt_id, $taxonomy, $args );

	$wpdb->update( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ), array( 'term_taxonomy_id' => $tt_id ) );

	/**
	 * Fires immediately after a term-taxonomy relationship is updated.
	 *
	 * @since 2.9.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edited_term_taxonomy', $tt_id, $taxonomy, $args );

	/**
	 * Fires after a term has been updated, but before the term cache has been cleaned.
	 *
	 * The {@see 'edit_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edit_term', $term_id, $tt_id, $taxonomy, $args );

	/**
	 * Fires after a term in a specific taxonomy has been updated, but before the term
	 * cache has been cleaned.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
	 *
	 * Possible hook names include:
	 *
	 *  - `edit_category`
	 *  - `edit_post_tag`
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param array $args    Arguments passed to wp_update_term().
	 */
	do_action( "edit_{$taxonomy}", $term_id, $tt_id, $args );

	/** This filter is documented in wp-includes/taxonomy.php */
	$term_id = apply_filters( 'term_id_filter', $term_id, $tt_id, $args );

	clean_term_cache( $term_id, $taxonomy );

	/**
	 * Fires after a term has been updated, and the term cache has been cleaned.
	 *
	 * The {@see 'edited_$taxonomy'} hook is also available for targeting a specific
	 * taxonomy.
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int    $term_id  Term ID.
	 * @param int    $tt_id    Term taxonomy ID.
	 * @param string $taxonomy Taxonomy slug.
	 * @param array  $args     Arguments passed to wp_update_term().
	 */
	do_action( 'edited_term', $term_id, $tt_id, $taxonomy, $args );

	/**
	 * Fires after a term for a specific taxonomy has been updated, and the term
	 * cache has been cleaned.
	 *
	 * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
	 *
	 * Possible hook names include:
	 *
	 *  - `edited_category`
	 *  - `edited_post_tag`
	 *
	 * @since 2.3.0
	 * @since 6.1.0 The `$args` parameter was added.
	 *
	 * @param int   $term_id Term ID.
	 * @param int   $tt_id   Term taxonomy ID.
	 * @param array $args    Arguments passed to wp_update_term().
	 */
	do_action( "edited_{$taxonomy}", $term_id, $tt_id, $args );

	/** This action is documented in wp-includes/taxonomy.php */
	do_action( 'saved_term', $term_id, $tt_id, $taxonomy, true, $args );

	/** This action is documented in wp-includes/taxonomy.php */
	do_action( "saved_{$taxonomy}", $term_id, $tt_id, true, $args );

	return array(
		'term_id'          => $term_id,
		'term_taxonomy_id' => $tt_id,
	);
}

/**
 * Enables or disables term counting.
 *
 * @since 2.5.0
 *
 * @param bool $defer Optional. Enable if true, disable if false.
 * @return bool Whether term counting is enabled or disabled.
 */
function wp_defer_term_counting( $defer = null ) {
	static $_defer = false;

	if ( is_bool( $defer ) ) {
		$_defer = $defer;
		// Flush any deferred counts.
		if ( ! $defer ) {
			wp_update_term_count( null, null, true );
		}
	}

	return $_defer;
}

/**
 * Updates the amount of terms in taxonomy.
 *
 * If there is a taxonomy callback applied, then it will be called for updating
 * the count.
 *
 * The default action is to count what the amount of terms have the relationship
 * of term ID. Once that is done, then update the database.
 *
 * @since 2.3.0
 *
 * @param int|array $terms       The term_taxonomy_id of the terms.
 * @param string    $taxonomy    The context of the term.
 * @param bool      $do_deferred Whether to flush the deferred term counts too. Default false.
 * @return bool If no terms will return false, and if successful will return true.
 */
function wp_update_term_count( $terms, $taxonomy, $do_deferred = false ) {
	static $_deferred = array();

	if ( $do_deferred ) {
		foreach ( (array) array_keys( $_deferred ) as $tax ) {
			wp_update_term_count_now( $_deferred[ $tax ], $tax );
			unset( $_deferred[ $tax ] );
		}
	}

	if ( empty( $terms ) ) {
		return false;
	}

	if ( ! is_array( $terms ) ) {
		$terms = array( $terms );
	}

	if ( wp_defer_term_counting() ) {
		if ( ! isset( $_deferred[ $taxonomy ] ) ) {
			$_deferred[ $taxonomy ] = array();
		}
		$_deferred[ $taxonomy ] = array_unique( array_merge( $_deferred[ $taxonomy ], $terms ) );
		return true;
	}

	return wp_update_term_count_now( $terms, $taxonomy );
}

/**
 * Performs term count update immediately.
 *
 * @since 2.5.0
 *
 * @param array  $terms    The term_taxonomy_id of terms to update.
 * @param string $taxonomy The context of the term.
 * @return true Always true when complete.
 */
function wp_update_term_count_now( $terms, $taxonomy ) {
	$terms = array_map( 'intval', $terms );

	$taxonomy = get_taxonomy( $taxonomy );
	if ( ! empty( $taxonomy->update_count_callback ) ) {
		call_user_func( $taxonomy->update_count_callback, $terms, $taxonomy );
	} else {
		$object_types = (array) $taxonomy->object_type;
		foreach ( $object_types as &$object_type ) {
			if ( str_starts_with( $object_type, 'attachment:' ) ) {
				list( $object_type ) = explode( ':', $object_type );
			}
		}

		if ( array_filter( $object_types, 'post_type_exists' ) == $object_types ) {
			// Only post types are attached to this taxonomy.
			_update_post_term_count( $terms, $taxonomy );
		} else {
			// Default count updater.
			_update_generic_term_count( $terms, $taxonomy );
		}
	}

	clean_term_cache( $terms, '', false );

	return true;
}

//
// Cache.
//

/**
 * Removes the taxonomy relationship to terms from the cache.
 *
 * Will remove the entire taxonomy relationship containing term `$object_id`. The
 * term IDs have to exist within the taxonomy `$object_type` for the deletion to
 * take place.
 *
 * @since 2.3.0
 *
 * @global bool $_wp_suspend_cache_invalidation
 *
 * @see get_object_taxonomies() for more on $object_type.
 *
 * @param int|array    $object_ids  Single or list of term object ID(s).
 * @param array|string $object_type The taxonomy object type.
 */
function clean_object_term_cache( $object_ids, $object_type ) {
	global $_wp_suspend_cache_invalidation;

	if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
		return;
	}

	if ( ! is_array( $object_ids ) ) {
		$object_ids = array( $object_ids );
	}

	$taxonomies = get_object_taxonomies( $object_type );

	foreach ( $taxonomies as $taxonomy ) {
		wp_cache_delete_multiple( $object_ids, "{$taxonomy}_relationships" );
	}

	wp_cache_set_terms_last_changed();

	/**
	 * Fires after the object term cache has been cleaned.
	 *
	 * @since 2.5.0
	 *
	 * @param array  $object_ids An array of object IDs.
	 * @param string $object_type Object type.
	 */
	do_action( 'clean_object_term_cache', $object_ids, $object_type );
}

/**
 * Removes all of the term IDs from the cache.
 *
 * @since 2.3.0
 *
 * @global wpdb $wpdb                           WordPress database abstraction object.
 * @global bool $_wp_suspend_cache_invalidation
 *
 * @param int|int[] $ids            Single or array of term IDs.
 * @param string    $taxonomy       Optional. Taxonomy slug. Can be empty, in which case the taxonomies of the passed
 *                                  term IDs will be used. Default empty.
 * @param bool      $clean_taxonomy Optional. Whether to clean taxonomy wide caches (true), or just individual
 *                                  term object caches (false). Default true.
 */
function clean_term_cache( $ids, $taxonomy = '', $clean_taxonomy = true ) {
	global $wpdb, $_wp_suspend_cache_invalidation;

	if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
		return;
	}

	if ( ! is_array( $ids ) ) {
		$ids = array( $ids );
	}

	$taxonomies = array();
	// If no taxonomy, assume tt_ids.
	if ( empty( $taxonomy ) ) {
		$tt_ids = array_map( 'intval', $ids );
		$tt_ids = implode( ', ', $tt_ids );
		$terms  = $wpdb->get_results( "SELECT term_id, taxonomy FROM $wpdb->term_taxonomy WHERE term_taxonomy_id IN ($tt_ids)" );
		$ids    = array();

		foreach ( (array) $terms as $term ) {
			$taxonomies[] = $term->taxonomy;
			$ids[]        = $term->term_id;
		}
		wp_cache_delete_multiple( $ids, 'terms' );
		$taxonomies = array_unique( $taxonomies );
	} else {
		wp_cache_delete_multiple( $ids, 'terms' );
		$taxonomies = array( $taxonomy );
	}

	foreach ( $taxonomies as $taxonomy ) {
		if ( $clean_taxonomy ) {
			clean_taxonomy_cache( $taxonomy );
		}

		/**
		 * Fires once after each taxonomy's term cache has been cleaned.
		 *
		 * @since 2.5.0
		 * @since 4.5.0 Added the `$clean_taxonomy` parameter.
		 *
		 * @param array  $ids            An array of term IDs.
		 * @param string $taxonomy       Taxonomy slug.
		 * @param bool   $clean_taxonomy Whether or not to clean taxonomy-wide caches
		 */
		do_action( 'clean_term_cache', $ids, $taxonomy, $clean_taxonomy );
	}

	wp_cache_set_terms_last_changed();
}

/**
 * Cleans the caches for a taxonomy.
 *
 * @since 4.9.0
 *
 * @param string $taxonomy Taxonomy slug.
 */
function clean_taxonomy_cache( $taxonomy ) {
	wp_cache_delete( 'all_ids', $taxonomy );
	wp_cache_delete( 'get', $taxonomy );
	wp_cache_set_terms_last_changed();

	// Regenerate cached hierarchy.
	if ( is_taxonomy_hierarchical( $taxonomy ) ) {
		delete_option( "{$taxonomy}_children" );
		_get_term_hierarchy( $taxonomy );
	}

	/**
	 * Fires after a taxonomy's caches have been cleaned.
	 *
	 * @since 4.9.0
	 *
	 * @param string $taxonomy Taxonomy slug.
	 */
	do_action( 'clean_taxonomy_cache', $taxonomy );
}

/**
 * Retrieves the cached term objects for the given object ID.
 *
 * Upstream functions (like get_the_terms() and is_object_in_term()) are
 * responsible for populating the object-term relationship cache. The current
 * function only fetches relationship data that is already in the cache.
 *
 * @since 2.3.0
 * @since 4.7.0 Returns a `WP_Error` object if there's an error with
 *              any of the matched terms.
 *
 * @param int    $id       Term object ID, for example a post, comment, or user ID.
 * @param string $taxonomy Taxonomy name.
 * @return bool|WP_Term[]|WP_Error Array of `WP_Term` objects, if cached.
 *                                 False if cache is empty for `$taxonomy` and `$id`.
 *                                 WP_Error if get_term() returns an error object for any term.
 */
function get_object_term_cache( $id, $taxonomy ) {
	$_term_ids = wp_cache_get( $id, "{$taxonomy}_relationships" );

	// We leave the priming of relationship caches to upstream functions.
	if ( false === $_term_ids ) {
		return false;
	}

	// Backward compatibility for if a plugin is putting objects into the cache, rather than IDs.
	$term_ids = array();
	foreach ( $_term_ids as $term_id ) {
		if ( is_numeric( $term_id ) ) {
			$term_ids[] = (int) $term_id;
		} elseif ( isset( $term_id->term_id ) ) {
			$term_ids[] = (int) $term_id->term_id;
		}
	}

	// Fill the term objects.
	_prime_term_caches( $term_ids );

	$terms = array();
	foreach ( $term_ids as $term_id ) {
		$term = get_term( $term_id, $taxonomy );
		if ( is_wp_error( $term ) ) {
			return $term;
		}

		$terms[] = $term;
	}

	return $terms;
}

/**
 * Updates the cache for the given term object ID(s).
 *
 * Note: Due to performance concerns, great care should be taken to only update
 * term caches when necessary. Processing time can increase exponentially depending
 * on both the number of passed term IDs and the number of taxonomies those terms
 * belong to.
 *
 * Caches will only be updated for terms not already cached.
 *
 * @since 2.3.0
 *
 * @param string|int[]    $object_ids  Comma-separated list or array of term object IDs.
 * @param string|string[] $object_type The taxonomy object type or array of the same.
 * @return void|false Void on success or if the `$object_ids` parameter is empty,
 *                    false if all of the terms in `$object_ids` are already cached.
 */
function update_object_term_cache( $object_ids, $object_type ) {
	if ( empty( $object_ids ) ) {
		return;
	}

	if ( ! is_array( $object_ids ) ) {
		$object_ids = explode( ',', $object_ids );
	}

	$object_ids     = array_map( 'intval', $object_ids );
	$non_cached_ids = array();

	$taxonomies = get_object_taxonomies( $object_type );

	foreach ( $taxonomies as $taxonomy ) {
		$cache_values = wp_cache_get_multiple( (array) $object_ids, "{$taxonomy}_relationships" );

		foreach ( $cache_values as $id => $value ) {
			if ( false === $value ) {
				$non_cached_ids[] = $id;
			}
		}
	}

	if ( empty( $non_cached_ids ) ) {
		return false;
	}

	$non_cached_ids = array_unique( $non_cached_ids );

	$terms = wp_get_object_terms(
		$non_cached_ids,
		$taxonomies,
		array(
			'fields'                 => 'all_with_object_id',
			'orderby'                => 'name',
			'update_term_meta_cache' => false,
		)
	);

	$object_terms = array();
	foreach ( (array) $terms as $term ) {
		$object_terms[ $term->object_id ][ $term->taxonomy ][] = $term->term_id;
	}

	foreach ( $non_cached_ids as $id ) {
		foreach ( $taxonomies as $taxonomy ) {
			if ( ! isset( $object_terms[ $id ][ $taxonomy ] ) ) {
				if ( ! isset( $object_terms[ $id ] ) ) {
					$object_terms[ $id ] = array();
				}
				$object_terms[ $id ][ $taxonomy ] = array();
			}
		}
	}

	$cache_values = array();
	foreach ( $object_terms as $id => $value ) {
		foreach ( $value as $taxonomy => $terms ) {
			$cache_values[ $taxonomy ][ $id ] = $terms;
		}
	}
	foreach ( $cache_values as $taxonomy => $data ) {
		wp_cache_add_multiple( $data, "{$taxonomy}_relationships" );
	}
}

/**
 * Updates terms in cache.
 *
 * @since 2.3.0
 *
 * @param WP_Term[] $terms    Array of term objects to change.
 * @param string    $taxonomy Not used.
 */
function update_term_cache( $terms, $taxonomy = '' ) {
	$data = array();
	foreach ( (array) $terms as $term ) {
		// Create a copy in case the array was passed by reference.
		$_term = clone $term;

		// Object ID should not be cached.
		unset( $_term->object_id );

		$data[ $term->term_id ] = $_term;
	}
	wp_cache_add_multiple( $data, 'terms' );
}

//
// Private.
//

/**
 * Retrieves children of taxonomy as term IDs.
 *
 * @access private
 * @since 2.3.0
 *
 * @param string $taxonomy Taxonomy name.
 * @return array Empty if $taxonomy isn't hierarchical or returns children as term IDs.
 */
function _get_term_hierarchy( $taxonomy ) {
	if ( ! is_taxonomy_hierarchical( $taxonomy ) ) {
		return array();
	}
	$children = get_option( "{$taxonomy}_children" );

	if ( is_array( $children ) ) {
		return $children;
	}
	$children = array();
	$terms    = get_terms(
		array(
			'taxonomy'               => $taxonomy,
			'get'                    => 'all',
			'orderby'                => 'id',
			'fields'                 => 'id=>parent',
			'update_term_meta_cache' => false,
		)
	);
	foreach ( $terms as $term_id => $parent ) {
		if ( $parent > 0 ) {
			$children[ $parent ][] = $term_id;
		}
	}
	update_option( "{$taxonomy}_children", $children );

	return $children;
}

/**
 * Gets the subset of $terms that are descendants of $term_id.
 *
 * If `$terms` is an array of objects, then _get_term_children() returns an array of objects.
 * If `$terms` is an array of IDs, then _get_term_children() returns an array of IDs.
 *
 * @access private
 * @since 2.3.0
 *
 * @param int    $term_id   The ancestor term: all returned terms should be descendants of `$term_id`.
 * @param array  $terms     The set of terms - either an array of term objects or term IDs - from which those that
 *                          are descendants of $term_id will be chosen.
 * @param string $taxonomy  The taxonomy which determines the hierarchy of the terms.
 * @param array  $ancestors Optional. Term ancestors that have already been identified. Passed by reference, to keep
 *                          track of found terms when recursing the hierarchy. The array of located ancestors is used
 *                          to prevent infinite recursion loops. For performance, `term_ids` are used as array keys,
 *                          with 1 as value. Default empty array.
 * @return array|WP_Error The subset of $terms that are descendants of $term_id.
 */
function _get_term_children( $term_id, $terms, $taxonomy, &$ancestors = array() ) {
	$empty_array = array();
	if ( empty( $terms ) ) {
		return $empty_array;
	}

	$term_id      = (int) $term_id;
	$term_list    = array();
	$has_children = _get_term_hierarchy( $taxonomy );

	if ( $term_id && ! isset( $has_children[ $term_id ] ) ) {
		return $empty_array;
	}

	// Include the term itself in the ancestors array, so we can properly detect when a loop has occurred.
	if ( empty( $ancestors ) ) {
		$ancestors[ $term_id ] = 1;
	}

	foreach ( (array) $terms as $term ) {
		$use_id = false;
		if ( ! is_object( $term ) ) {
			$term = get_term( $term, $taxonomy );
			if ( is_wp_error( $term ) ) {
				return $term;
			}
			$use_id = true;
		}

		// Don't recurse if we've already identified the term as a child - this indicates a loop.
		if ( isset( $ancestors[ $term->term_id ] ) ) {
			continue;
		}

		if ( (int) $term->parent === $term_id ) {
			if ( $use_id ) {
				$term_list[] = $term->term_id;
			} else {
				$term_list[] = $term;
			}

			if ( ! isset( $has_children[ $term->term_id ] ) ) {
				continue;
			}

			$ancestors[ $term->term_id ] = 1;

			$children = _get_term_children( $term->term_id, $terms, $taxonomy, $ancestors );
			if ( $children ) {
				$term_list = array_merge( $term_list, $children );
			}
		}
	}

	return $term_list;
}

/**
 * Adds count of children to parent count.
 *
 * Recalculates term counts by including items from child terms. Assumes all
 * relevant children are already in the $terms argument.
 *
 * @access private
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param object[]|WP_Term[] $terms    List of term objects (passed by reference).
 * @param string             $taxonomy Term context.
 */
function _pad_term_counts( &$terms, $taxonomy ) {
	global $wpdb;

	// This function only works for hierarchical taxonomies like post categories.
	if ( ! is_taxonomy_hierarchical( $taxonomy ) ) {
		return;
	}

	$term_hier = _get_term_hierarchy( $taxonomy );

	if ( empty( $term_hier ) ) {
		return;
	}

	$term_items  = array();
	$terms_by_id = array();
	$term_ids    = array();

	foreach ( (array) $terms as $key => $term ) {
		$terms_by_id[ $term->term_id ]       = & $terms[ $key ];
		$term_ids[ $term->term_taxonomy_id ] = $term->term_id;
	}

	// Get the object and term IDs and stick them in a lookup table.
	$tax_obj      = get_taxonomy( $taxonomy );
	$object_types = esc_sql( $tax_obj->object_type );
	$results      = $wpdb->get_results( "SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (" . implode( ',', array_keys( $term_ids ) ) . ") AND post_type IN ('" . implode( "', '", $object_types ) . "') AND post_status = 'publish'" );

	foreach ( $results as $row ) {
		$id = $term_ids[ $row->term_taxonomy_id ];

		$term_items[ $id ][ $row->object_id ] = isset( $term_items[ $id ][ $row->object_id ] ) ? ++$term_items[ $id ][ $row->object_id ] : 1;
	}

	// Touch every ancestor's lookup row for each post in each term.
	foreach ( $term_ids as $term_id ) {
		$child     = $term_id;
		$ancestors = array();
		while ( ! empty( $terms_by_id[ $child ] ) && $parent = $terms_by_id[ $child ]->parent ) {
			$ancestors[] = $child;

			if ( ! empty( $term_items[ $term_id ] ) ) {
				foreach ( $term_items[ $term_id ] as $item_id => $touches ) {
					$term_items[ $parent ][ $item_id ] = isset( $term_items[ $parent ][ $item_id ] ) ? ++$term_items[ $parent ][ $item_id ] : 1;
				}
			}

			$child = $parent;

			if ( in_array( $parent, $ancestors, true ) ) {
				break;
			}
		}
	}

	// Transfer the touched cells.
	foreach ( (array) $term_items as $id => $items ) {
		if ( isset( $terms_by_id[ $id ] ) ) {
			$terms_by_id[ $id ]->count = count( $items );
		}
	}
}

/**
 * Adds any terms from the given IDs to the cache that do not already exist in cache.
 *
 * @since 4.6.0
 * @since 6.1.0 This function is no longer marked as "private".
 * @since 6.3.0 Use wp_lazyload_term_meta() for lazy-loading of term meta.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param array $term_ids          Array of term IDs.
 * @param bool  $update_meta_cache Optional. Whether to update the meta cache. Default true.
 */
function _prime_term_caches( $term_ids, $update_meta_cache = true ) {
	global $wpdb;

	$non_cached_ids = _get_non_cached_ids( $term_ids, 'terms' );
	if ( ! empty( $non_cached_ids ) ) {
		$fresh_terms = $wpdb->get_results( sprintf( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE t.term_id IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) );

		update_term_cache( $fresh_terms );
	}

	if ( $update_meta_cache ) {
		wp_lazyload_term_meta( $term_ids );
	}
}

//
// Default callbacks.
//

/**
 * Updates term count based on object types of the current taxonomy.
 *
 * Private function for the default callback for post_tag and category
 * taxonomies.
 *
 * @access private
 * @since 2.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int[]       $terms    List of term taxonomy IDs.
 * @param WP_Taxonomy $taxonomy Current taxonomy object of terms.
 */
function _update_post_term_count( $terms, $taxonomy ) {
	global $wpdb;

	$object_types = (array) $taxonomy->object_type;

	foreach ( $object_types as &$object_type ) {
		list( $object_type ) = explode( ':', $object_type );
	}

	$object_types = array_unique( $object_types );

	$check_attachments = array_search( 'attachment', $object_types, true );
	if ( false !== $check_attachments ) {
		unset( $object_types[ $check_attachments ] );
		$check_attachments = true;
	}

	if ( $object_types ) {
		$object_types = esc_sql( array_filter( $object_types, 'post_type_exists' ) );
	}

	$post_statuses = array( 'publish' );

	/**
	 * Filters the post statuses for updating the term count.
	 *
	 * @since 5.7.0
	 *
	 * @param string[]    $post_statuses List of post statuses to include in the count. Default is 'publish'.
	 * @param WP_Taxonomy $taxonomy      Current taxonomy object.
	 */
	$post_statuses = esc_sql( apply_filters( 'update_post_term_count_statuses', $post_statuses, $taxonomy ) );

	foreach ( (array) $terms as $tt_id ) {
		$count = 0;

		// Attachments can be 'inherit' status, we need to base count off the parent's status if so.
		if ( $check_attachments ) {
			// phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.QuotedDynamicPlaceholderGeneration
			$count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts p1 WHERE p1.ID = $wpdb->term_relationships.object_id AND ( post_status IN ('" . implode( "', '", $post_statuses ) . "') OR ( post_status = 'inherit' AND post_parent > 0 AND ( SELECT post_status FROM $wpdb->posts WHERE ID = p1.post_parent ) IN ('" . implode( "', '", $post_statuses ) . "') ) ) AND post_type = 'attachment' AND term_taxonomy_id = %d", $tt_id ) );
		}

		if ( $object_types ) {
			// phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.QuotedDynamicPlaceholderGeneration
			$count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status IN ('" . implode( "', '", $post_statuses ) . "') AND post_type IN ('" . implode( "', '", $object_types ) . "') AND term_taxonomy_id = %d", $tt_id ) );
		}

		/**
		 * Fires when a term count is calculated, before it is updated in the database.
		 *
		 * @since 6.9.0
		 *
		 * @param int    $tt_id         Term taxonomy ID.
		 * @param string $taxonomy_name Taxonomy slug.
		 * @param int    $count         Term count.
		 */
		do_action( 'update_term_count', $tt_id, $taxonomy->name, $count );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edit_term_taxonomy', $tt_id, $taxonomy->name, array() );
		$wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $tt_id ) );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edited_term_taxonomy', $tt_id, $taxonomy->name, array() );
	}
}

/**
 * Updates term count based on number of objects.
 *
 * Default callback for the 'link_category' taxonomy.
 *
 * @since 3.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int[]       $terms    List of term taxonomy IDs.
 * @param WP_Taxonomy $taxonomy Current taxonomy object of terms.
 */
function _update_generic_term_count( $terms, $taxonomy ) {
	global $wpdb;

	foreach ( (array) $terms as $term ) {
		$count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term ) );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'update_term_count', $term, $taxonomy->name, $count );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edit_term_taxonomy', $term, $taxonomy->name, array() );
		$wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );

		/** This action is documented in wp-includes/taxonomy.php */
		do_action( 'edited_term_taxonomy', $term, $taxonomy->name, array() );
	}
}

/**
 * Creates a new term for a term_taxonomy item that currently shares its term
 * with another term_taxonomy.
 *
 * @ignore
 * @since 4.2.0
 * @since 4.3.0 Introduced `$record` parameter. Also, `$term_id` and
 *              `$term_taxonomy_id` can now accept objects.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int|object $term_id          ID of the shared term, or the shared term object.
 * @param int|object $term_taxonomy_id ID of the term_taxonomy item to receive a new term, or the term_taxonomy object
 *                                     (corresponding to a row from the term_taxonomy table).
 * @param bool       $record           Whether to record data about the split term in the options table. The recording
 *                                     process has the potential to be resource-intensive, so during batch operations
 *                                     it can be beneficial to skip inline recording and do it just once, after the
 *                                     batch is processed. Only set this to `false` if you know what you are doing.
 *                                     Default: true.
 * @return int|WP_Error When the current term does not need to be split (or cannot be split on the current
 *                      database schema), `$term_id` is returned. When the term is successfully split, the
 *                      new term_id is returned. A WP_Error is returned for miscellaneous errors.
 */
function _split_shared_term( $term_id, $term_taxonomy_id, $record = true ) {
	global $wpdb;

	if ( is_object( $term_id ) ) {
		$shared_term = $term_id;
		$term_id     = (int) $shared_term->term_id;
	}

	if ( is_object( $term_taxonomy_id ) ) {
		$term_taxonomy    = $term_taxonomy_id;
		$term_taxonomy_id = (int) $term_taxonomy->term_taxonomy_id;
	}

	// If there are no shared term_taxonomy rows, there's nothing to do here.
	$shared_tt_count = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy tt WHERE tt.term_id = %d AND tt.term_taxonomy_id != %d", $term_id, $term_taxonomy_id ) );

	if ( ! $shared_tt_count ) {
		return $term_id;
	}

	/*
	 * Verify that the term_taxonomy_id passed to the function is actually associated with the term_id.
	 * If there's a mismatch, it may mean that the term is already split. Return the actual term_id from the db.
	 */
	$check_term_id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $term_taxonomy_id ) );
	if ( $check_term_id !== $term_id ) {
		return $check_term_id;
	}

	// Pull up data about the currently shared slug, which we'll use to populate the new one.
	if ( empty( $shared_term ) ) {
		$shared_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.* FROM $wpdb->terms t WHERE t.term_id = %d", $term_id ) );
	}

	$new_term_data = array(
		'name'       => $shared_term->name,
		'slug'       => $shared_term->slug,
		'term_group' => $shared_term->term_group,
	);

	if ( false === $wpdb->insert( $wpdb->terms, $new_term_data ) ) {
		return new WP_Error( 'db_insert_error', __( 'Could not split shared term.' ), $wpdb->last_error );
	}

	$new_term_id = (int) $wpdb->insert_id;

	// Update the existing term_taxonomy to point to the newly created term.
	$wpdb->update(
		$wpdb->term_taxonomy,
		array( 'term_id' => $new_term_id ),
		array( 'term_taxonomy_id' => $term_taxonomy_id )
	);

	// Reassign child terms to the new parent.
	if ( empty( $term_taxonomy ) ) {
		$term_taxonomy = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $term_taxonomy_id ) );
	}

	$children_tt_ids = $wpdb->get_col( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_taxonomy WHERE parent = %d AND taxonomy = %s", $term_id, $term_taxonomy->taxonomy ) );
	if ( ! empty( $children_tt_ids ) ) {
		foreach ( $children_tt_ids as $child_tt_id ) {
			$wpdb->update(
				$wpdb->term_taxonomy,
				array( 'parent' => $new_term_id ),
				array( 'term_taxonomy_id' => $child_tt_id )
			);
			clean_term_cache( (int) $child_tt_id, '', false );
		}
	} else {
		// If the term has no children, we must force its taxonomy cache to be rebuilt separately.
		clean_term_cache( $new_term_id, $term_taxonomy->taxonomy, false );
	}

	clean_term_cache( $term_id, $term_taxonomy->taxonomy, false );

	/*
	 * Taxonomy cache clearing is delayed to avoid race conditions that may occur when
	 * regenerating the taxonomy's hierarchy tree.
	 */
	$taxonomies_to_clean = array( $term_taxonomy->taxonomy );

	// Clean the cache for term taxonomies formerly shared with the current term.
	$shared_term_taxonomies = $wpdb->get_col( $wpdb->prepare( "SELECT taxonomy FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id ) );
	$taxonomies_to_clean    = array_merge( $taxonomies_to_clean, $shared_term_taxonomies );

	foreach ( $taxonomies_to_clean as $taxonomy_to_clean ) {
		clean_taxonomy_cache( $taxonomy_to_clean );
	}

	// Keep a record of term_ids that have been split, keyed by old term_id. See wp_get_split_term().
	if ( $record ) {
		$split_term_data = get_option( '_split_terms', array() );
		if ( ! isset( $split_term_data[ $term_id ] ) ) {
			$split_term_data[ $term_id ] = array();
		}

		$split_term_data[ $term_id ][ $term_taxonomy->taxonomy ] = $new_term_id;
		update_option( '_split_terms', $split_term_data );
	}

	// If we've just split the final shared term, set the "finished" flag.
	$shared_terms_exist = $wpdb->get_results(
		"SELECT tt.term_id, t.*, count(*) as term_tt_count FROM {$wpdb->term_taxonomy} tt
		 LEFT JOIN {$wpdb->terms} t ON t.term_id = tt.term_id
		 GROUP BY t.term_id
		 HAVING term_tt_count > 1
		 LIMIT 1"
	);
	if ( ! $shared_terms_exist ) {
		update_option( 'finished_splitting_shared_terms', true );
	}

	/**
	 * Fires after a previously shared taxonomy term is split into two separate terms.
	 *
	 * @since 4.2.0
	 *
	 * @param int    $term_id          ID of the formerly shared term.
	 * @param int    $new_term_id      ID of the new term created for the $term_taxonomy_id.
	 * @param int    $term_taxonomy_id ID for the term_taxonomy row affected by the split.
	 * @param string $taxonomy         Taxonomy for the split term.
	 */
	do_action( 'split_shared_term', $term_id, $new_term_id, $term_taxonomy_id, $term_taxonomy->taxonomy );

	return $new_term_id;
}

/**
 * Splits a batch of shared taxonomy terms.
 *
 * @since 4.3.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 */
function _wp_batch_split_terms() {
	global $wpdb;

	$lock_name = 'term_split.lock';

	// Try to lock.
	$lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'off') /* LOCK */", $lock_name, time() ) );

	if ( ! $lock_result ) {
		$lock_result = get_option( $lock_name );

		// Bail if we were unable to create a lock, or if the existing lock is still valid.
		if ( ! $lock_result || ( $lock_result > ( time() - HOUR_IN_SECONDS ) ) ) {
			wp_schedule_single_event( time() + ( 5 * MINUTE_IN_SECONDS ), 'wp_split_shared_term_batch' );
			return;
		}
	}

	// Update the lock, as by this point we've definitely got a lock, just need to fire the actions.
	update_option( $lock_name, time() );

	// Get a list of shared terms (those with more than one associated row in term_taxonomy).
	$shared_terms = $wpdb->get_results(
		"SELECT tt.term_id, t.*, count(*) as term_tt_count FROM {$wpdb->term_taxonomy} tt
		 LEFT JOIN {$wpdb->terms} t ON t.term_id = tt.term_id
		 GROUP BY t.term_id
		 HAVING term_tt_count > 1
		 LIMIT 10"
	);

	// No more terms, we're done here.
	if ( ! $shared_terms ) {
		update_option( 'finished_splitting_shared_terms', true );
		delete_option( $lock_name );
		return;
	}

	// Shared terms found? We'll need to run this script again.
	wp_schedule_single_event( time() + ( 2 * MINUTE_IN_SECONDS ), 'wp_split_shared_term_batch' );

	// Rekey shared term array for faster lookups.
	$_shared_terms = array();
	foreach ( $shared_terms as $shared_term ) {
		$term_id                   = (int) $shared_term->term_id;
		$_shared_terms[ $term_id ] = $shared_term;
	}
	$shared_terms = $_shared_terms;

	// Get term taxonomy data for all shared terms.
	$shared_term_ids = implode( ',', array_keys( $shared_terms ) );
	$shared_tts      = $wpdb->get_results( "SELECT * FROM {$wpdb->term_taxonomy} WHERE `term_id` IN ({$shared_term_ids})" );

	// Split term data recording is slow, so we do it just once, outside the loop.
	$split_term_data    = get_option( '_split_terms', array() );
	$skipped_first_term = array();
	$taxonomies         = array();
	foreach ( $shared_tts as $shared_tt ) {
		$term_id = (int) $shared_tt->term_id;

		// Don't split the first tt belonging to a given term_id.
		if ( ! isset( $skipped_first_term[ $term_id ] ) ) {
			$skipped_first_term[ $term_id ] = 1;
			continue;
		}

		if ( ! isset( $split_term_data[ $term_id ] ) ) {
			$split_term_data[ $term_id ] = array();
		}

		// Keep track of taxonomies whose hierarchies need flushing.
		if ( ! isset( $taxonomies[ $shared_tt->taxonomy ] ) ) {
			$taxonomies[ $shared_tt->taxonomy ] = 1;
		}

		// Split the term.
		$split_term_data[ $term_id ][ $shared_tt->taxonomy ] = _split_shared_term( $shared_terms[ $term_id ], $shared_tt, false );
	}

	// Rebuild the cached hierarchy for each affected taxonomy.
	foreach ( array_keys( $taxonomies ) as $tax ) {
		delete_option( "{$tax}_children" );
		_get_term_hierarchy( $tax );
	}

	update_option( '_split_terms', $split_term_data );

	delete_option( $lock_name );
}

/**
 * In order to avoid the _wp_batch_split_terms() job being accidentally removed,
 * checks that it's still scheduled while we haven't finished splitting terms.
 *
 * @ignore
 * @since 4.3.0
 */
function _wp_check_for_scheduled_split_terms() {
	if ( ! get_option( 'finished_splitting_shared_terms' ) && ! wp_next_scheduled( 'wp_split_shared_term_batch' ) ) {
		wp_schedule_single_event( time() + MINUTE_IN_SECONDS, 'wp_split_shared_term_batch' );
	}
}

/**
 * Checks default categories when a term gets split to see if any of them need to be updated.
 *
 * @ignore
 * @since 4.2.0
 *
 * @param int    $term_id          ID of the formerly shared term.
 * @param int    $new_term_id      ID of the new term created for the $term_taxonomy_id.
 * @param int    $term_taxonomy_id ID for the term_taxonomy row affected by the split.
 * @param string $taxonomy         Taxonomy for the split term.
 */
function _wp_check_split_default_terms( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) {
	if ( 'category' !== $taxonomy ) {
		return;
	}

	foreach ( array( 'default_category', 'default_link_category', 'default_email_category' ) as $option ) {
		if ( (int) get_option( $option, -1 ) === $term_id ) {
			update_option( $option, $new_term_id );
		}
	}
}

/**
 * Checks menu items when a term gets split to see if any of them need to be updated.
 *
 * @ignore
 * @since 4.2.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int    $term_id          ID of the formerly shared term.
 * @param int    $new_term_id      ID of the new term created for the $term_taxonomy_id.
 * @param int    $term_taxonomy_id ID for the term_taxonomy row affected by the split.
 * @param string $taxonomy         Taxonomy for the split term.
 */
function _wp_check_split_terms_in_menus( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) {
	global $wpdb;
	$post_ids = $wpdb->get_col(
		$wpdb->prepare(
			"SELECT m1.post_id
		FROM {$wpdb->postmeta} AS m1
			INNER JOIN {$wpdb->postmeta} AS m2 ON ( m2.post_id = m1.post_id )
			INNER JOIN {$wpdb->postmeta} AS m3 ON ( m3.post_id = m1.post_id )
		WHERE ( m1.meta_key = '_menu_item_type' AND m1.meta_value = 'taxonomy' )
			AND ( m2.meta_key = '_menu_item_object' AND m2.meta_value = %s )
			AND ( m3.meta_key = '_menu_item_object_id' AND m3.meta_value = %d )",
			$taxonomy,
			$term_id
		)
	);

	if ( $post_ids ) {
		foreach ( $post_ids as $post_id ) {
			update_post_meta( $post_id, '_menu_item_object_id', $new_term_id, $term_id );
		}
	}
}

/**
 * If the term being split is a nav_menu, changes associations.
 *
 * @ignore
 * @since 4.3.0
 *
 * @param int    $term_id          ID of the formerly shared term.
 * @param int    $new_term_id      ID of the new term created for the $term_taxonomy_id.
 * @param int    $term_taxonomy_id ID for the term_taxonomy row affected by the split.
 * @param string $taxonomy         Taxonomy for the split term.
 */
function _wp_check_split_nav_menu_terms( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) {
	if ( 'nav_menu' !== $taxonomy ) {
		return;
	}

	// Update menu locations.
	$locations = get_nav_menu_locations();
	foreach ( $locations as $location => $menu_id ) {
		if ( $term_id === $menu_id ) {
			$locations[ $location ] = $new_term_id;
		}
	}
	set_theme_mod( 'nav_menu_locations', $locations );
}

/**
 * Gets data about terms that previously shared a single term_id, but have since been split.
 *
 * @since 4.2.0
 *
 * @param int $old_term_id Term ID. This is the old, pre-split term ID.
 * @return array Array of new term IDs, keyed by taxonomy.
 */
function wp_get_split_terms( $old_term_id ) {
	$split_terms = get_option( '_split_terms', array() );

	$terms = array();
	if ( isset( $split_terms[ $old_term_id ] ) ) {
		$terms = $split_terms[ $old_term_id ];
	}

	return $terms;
}

/**
 * Gets the new term ID corresponding to a previously split term.
 *
 * @since 4.2.0
 *
 * @param int    $old_term_id Term ID. This is the old, pre-split term ID.
 * @param string $taxonomy    Taxonomy that the term belongs to.
 * @return int|false If a previously split term is found corresponding to the old term_id and taxonomy,
 *                   the new term_id will be returned. If no previously split term is found matching
 *                   the parameters, returns false.
 */
function wp_get_split_term( $old_term_id, $taxonomy ) {
	$split_terms = wp_get_split_terms( $old_term_id );

	$term_id = false;
	if ( isset( $split_terms[ $taxonomy ] ) ) {
		$term_id = (int) $split_terms[ $taxonomy ];
	}

	return $term_id;
}

/**
 * Determines whether a term is shared between multiple taxonomies.
 *
 * Shared taxonomy terms began to be split in 4.3, but failed cron tasks or
 * other delays in upgrade routines may cause shared terms to remain.
 *
 * @since 4.4.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int $term_id Term ID.
 * @return bool Returns false if a term is not shared between multiple taxonomies or
 *              if splitting shared taxonomy terms is finished.
 */
function wp_term_is_shared( $term_id ) {
	global $wpdb;

	if ( get_option( 'finished_splitting_shared_terms' ) ) {
		return false;
	}

	$tt_count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id ) );

	return $tt_count > 1;
}

/**
 * Generates a permalink for a taxonomy term archive.
 *
 * @since 2.5.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 *
 * @param WP_Term|int|string $term     The term object, ID, or slug whose link will be retrieved.
 * @param string             $taxonomy Optional. Taxonomy. Default empty.
 * @return string|WP_Error URL of the taxonomy term archive on success, WP_Error if term does not exist.
 */
function get_term_link( $term, $taxonomy = '' ) {
	global $wp_rewrite;

	if ( ! is_object( $term ) ) {
		if ( is_int( $term ) ) {
			$term = get_term( $term, $taxonomy );
		} else {
			$term = get_term_by( 'slug', $term, $taxonomy );
		}
	}

	if ( ! is_object( $term ) ) {
		$term = new WP_Error( 'invalid_term', __( 'Empty Term.' ) );
	}

	if ( is_wp_error( $term ) ) {
		return $term;
	}

	$taxonomy = $term->taxonomy;

	$termlink = $wp_rewrite->get_extra_permastruct( $taxonomy );

	/**
	 * Filters the permalink structure for a term before token replacement occurs.
	 *
	 * @since 4.9.0
	 *
	 * @param string  $termlink The permalink structure for the term's taxonomy.
	 * @param WP_Term $term     The term object.
	 */
	$termlink = apply_filters( 'pre_term_link', $termlink, $term );

	$slug = $term->slug;
	$t    = get_taxonomy( $taxonomy );

	if ( empty( $termlink ) ) {
		if ( 'category' === $taxonomy ) {
			$termlink = '?cat=' . $term->term_id;
		} elseif ( $t->query_var ) {
			$termlink = "?$t->query_var=$slug";
		} else {
			$termlink = "?taxonomy=$taxonomy&term=$slug";
		}
		$termlink = home_url( $termlink );
	} else {
		if ( ! empty( $t->rewrite['hierarchical'] ) ) {
			$hierarchical_slugs = array();
			$ancestors          = get_ancestors( $term->term_id, $taxonomy, 'taxonomy' );
			foreach ( (array) $ancestors as $ancestor ) {
				$ancestor_term        = get_term( $ancestor, $taxonomy );
				$hierarchical_slugs[] = $ancestor_term->slug;
			}
			$hierarchical_slugs   = array_reverse( $hierarchical_slugs );
			$hierarchical_slugs[] = $slug;
			$termlink             = str_replace( "%$taxonomy%", implode( '/', $hierarchical_slugs ), $termlink );
		} else {
			$termlink = str_replace( "%$taxonomy%", $slug, $termlink );
		}
		$termlink = home_url( user_trailingslashit( $termlink, 'category' ) );
	}

	// Back compat filters.
	if ( 'post_tag' === $taxonomy ) {

		/**
		 * Filters the tag link.
		 *
		 * @since 2.3.0
		 * @since 2.5.0 Deprecated in favor of {@see 'term_link'} filter.
		 * @since 5.4.1 Restored (un-deprecated).
		 *
		 * @param string $termlink Tag link URL.
		 * @param int    $term_id  Term ID.
		 */
		$termlink = apply_filters( 'tag_link', $termlink, $term->term_id );
	} elseif ( 'category' === $taxonomy ) {

		/**
		 * Filters the category link.
		 *
		 * @since 1.5.0
		 * @since 2.5.0 Deprecated in favor of {@see 'term_link'} filter.
		 * @since 5.4.1 Restored (un-deprecated).
		 *
		 * @param string $termlink Category link URL.
		 * @param int    $term_id  Term ID.
		 */
		$termlink = apply_filters( 'category_link', $termlink, $term->term_id );
	}

	/**
	 * Filters the term link.
	 *
	 * @since 2.5.0
	 *
	 * @param string  $termlink Term link URL.
	 * @param WP_Term $term     Term object.
	 * @param string  $taxonomy Taxonomy slug.
	 */
	return apply_filters( 'term_link', $termlink, $term, $taxonomy );
}

/**
 * Displays the taxonomies of a post with available options.
 *
 * This function can be used within the loop to display the taxonomies for a
 * post without specifying the Post ID. You can also use it outside the Loop to
 * display the taxonomies for a specific post.
 *
 * @since 2.5.0
 *
 * @param array $args {
 *     Arguments about which post to use and how to format the output. Shares all of the arguments
 *     supported by get_the_taxonomies(), in addition to the following.
 *
 *     @type int|WP_Post $post   Post ID or object to get taxonomies of. Default current post.
 *     @type string      $before Displays before the taxonomies. Default empty string.
 *     @type string      $sep    Separates each taxonomy. Default is a space.
 *     @type string      $after  Displays after the taxonomies. Default empty string.
 * }
 */
function the_taxonomies( $args = array() ) {
	$defaults = array(
		'post'   => 0,
		'before' => '',
		'sep'    => ' ',
		'after'  => '',
	);

	$parsed_args = wp_parse_args( $args, $defaults );

	echo $parsed_args['before'] . implode( $parsed_args['sep'], get_the_taxonomies( $parsed_args['post'], $parsed_args ) ) . $parsed_args['after'];
}

/**
 * Retrieves all taxonomies associated with a post.
 *
 * This function can be used within the loop. It will also return an array of
 * the taxonomies with links to the taxonomy and name.
 *
 * @since 2.5.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 * @param array       $args {
 *           Optional. Arguments about how to format the list of taxonomies. Default empty array.
 *
 *     @type string $template      Template for displaying a taxonomy label and list of terms.
 *                                 Default is "Label: Terms."
 *     @type string $term_template Template for displaying a single term in the list. Default is the term name
 *                                 linked to its archive.
 * }
 * @return string[] List of taxonomies.
 */
function get_the_taxonomies( $post = 0, $args = array() ) {
	$post = get_post( $post );

	$args = wp_parse_args(
		$args,
		array(
			/* translators: %s: Taxonomy label, %l: List of terms formatted as per $term_template. */
			'template'      => __( '%s: %l.' ),
			'term_template' => '<a href="%1$s">%2$s</a>',
		)
	);

	$taxonomies = array();

	if ( ! $post ) {
		return $taxonomies;
	}

	foreach ( get_object_taxonomies( $post ) as $taxonomy ) {
		$t = (array) get_taxonomy( $taxonomy );
		if ( empty( $t['label'] ) ) {
			$t['label'] = $taxonomy;
		}
		if ( empty( $t['args'] ) ) {
			$t['args'] = array();
		}
		if ( empty( $t['template'] ) ) {
			$t['template'] = $args['template'];
		}
		if ( empty( $t['term_template'] ) ) {
			$t['term_template'] = $args['term_template'];
		}

		$terms = get_object_term_cache( $post->ID, $taxonomy );
		if ( false === $terms ) {
			$terms = wp_get_object_terms( $post->ID, $taxonomy, $t['args'] );
		}
		$links = array();

		foreach ( $terms as $term ) {
			$links[] = wp_sprintf( $t['term_template'], esc_attr( get_term_link( $term ) ), $term->name );
		}
		if ( $links ) {
			$taxonomies[ $taxonomy ] = wp_sprintf( $t['template'], $t['label'], $links, $terms );
		}
	}
	return $taxonomies;
}

/**
 * Retrieves all taxonomy names for the given post.
 *
 * @since 2.5.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 * @return string[] An array of all taxonomy names for the given post.
 */
function get_post_taxonomies( $post = 0 ) {
	$post = get_post( $post );

	return get_object_taxonomies( $post );
}

/**
 * Determines if the given object is associated with any of the given terms.
 *
 * The given terms are checked against the object's terms' term_ids, names and slugs.
 * Terms given as integers will only be checked against the object's terms' term_ids.
 * If no terms are given, determines if object is associated with any terms in the given taxonomy.
 *
 * @since 2.7.0
 *
 * @param int                       $object_id ID of the object (post ID, link ID, ...).
 * @param string                    $taxonomy  Single taxonomy name.
 * @param int|string|int[]|string[] $terms     Optional. Term ID, name, slug, or array of such
 *                                             to check against. Default null.
 * @return bool|WP_Error WP_Error on input error.
 */
function is_object_in_term( $object_id, $taxonomy, $terms = null ) {
	$object_id = (int) $object_id;
	if ( ! $object_id ) {
		return new WP_Error( 'invalid_object', __( 'Invalid object ID.' ) );
	}

	$object_terms = get_object_term_cache( $object_id, $taxonomy );
	if ( false === $object_terms ) {
		$object_terms = wp_get_object_terms( $object_id, $taxonomy, array( 'update_term_meta_cache' => false ) );
		if ( is_wp_error( $object_terms ) ) {
			return $object_terms;
		}

		wp_cache_set( $object_id, wp_list_pluck( $object_terms, 'term_id' ), "{$taxonomy}_relationships" );
	}

	if ( is_wp_error( $object_terms ) ) {
		return $object_terms;
	}

	if ( empty( $object_terms ) ) {
		return false;
	}

	if ( empty( $terms ) ) {
		return true;
	}

	$terms = (array) $terms;

	$ints = array_filter( $terms, 'is_int' );
	if ( $ints ) {
		$strs = array_diff( $terms, $ints );
	} else {
		$strs =& $terms;
	}

	foreach ( $object_terms as $object_term ) {
		// If term is an int, check against term_ids only.
		if ( $ints && in_array( $object_term->term_id, $ints, true ) ) {
			return true;
		}

		if ( $strs ) {
			// Only check numeric strings against term_id, to avoid false matches due to type juggling.
			$numeric_strs = array_map( 'intval', array_filter( $strs, 'is_numeric' ) );
			if ( in_array( $object_term->term_id, $numeric_strs, true ) ) {
				return true;
			}

			if ( in_array( $object_term->name, $strs, true ) ) {
				return true;
			}
			if ( in_array( $object_term->slug, $strs, true ) ) {
				return true;
			}
		}
	}

	return false;
}

/**
 * Determines if the given object type is associated with the given taxonomy.
 *
 * @since 3.0.0
 *
 * @param string $object_type Object type string.
 * @param string $taxonomy    Single taxonomy name.
 * @return bool True if object is associated with the taxonomy, otherwise false.
 */
function is_object_in_taxonomy( $object_type, $taxonomy ) {
	$taxonomies = get_object_taxonomies( $object_type );
	if ( empty( $taxonomies ) ) {
		return false;
	}
	return in_array( $taxonomy, $taxonomies, true );
}

/**
 * Gets an array of ancestor IDs for a given object.
 *
 * @since 3.1.0
 * @since 4.1.0 Introduced the `$resource_type` argument.
 *
 * @param int    $object_id     Optional. The ID of the object. Default 0.
 * @param string $object_type   Optional. The type of object for which we'll be retrieving
 *                              ancestors. Accepts a post type or a taxonomy name. Default empty.
 * @param string $resource_type Optional. Type of resource $object_type is. Accepts 'post_type'
 *                              or 'taxonomy'. Default empty.
 * @return int[] An array of IDs of ancestors from lowest to highest in the hierarchy.
 */
function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' ) {
	$object_id = (int) $object_id;

	$ancestors = array();

	if ( empty( $object_id ) ) {

		/** This filter is documented in wp-includes/taxonomy.php */
		return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type );
	}

	if ( ! $resource_type ) {
		if ( is_taxonomy_hierarchical( $object_type ) ) {
			$resource_type = 'taxonomy';
		} elseif ( post_type_exists( $object_type ) ) {
			$resource_type = 'post_type';
		}
	}

	if ( 'taxonomy' === $resource_type ) {
		$term = get_term( $object_id, $object_type );
		while ( ! is_wp_error( $term ) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors, true ) ) {
			$ancestors[] = (int) $term->parent;
			$term        = get_term( $term->parent, $object_type );
		}
	} elseif ( 'post_type' === $resource_type ) {
		$ancestors = get_post_ancestors( $object_id );
	}

	/**
	 * Filters a given object's ancestors.
	 *
	 * @since 3.1.0
	 * @since 4.1.1 Introduced the `$resource_type` parameter.
	 *
	 * @param int[]  $ancestors     An array of IDs of object ancestors.
	 * @param int    $object_id     Object ID.
	 * @param string $object_type   Type of object.
	 * @param string $resource_type Type of resource $object_type is.
	 */
	return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type );
}

/**
 * Returns the term's parent's term ID.
 *
 * @since 3.1.0
 *
 * @param int    $term_id  Term ID.
 * @param string $taxonomy Taxonomy name.
 * @return int|false Parent term ID on success, false on failure.
 */
function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) {
	$term = get_term( $term_id, $taxonomy );
	if ( ! $term || is_wp_error( $term ) ) {
		return false;
	}
	return (int) $term->parent;
}

/**
 * Checks the given subset of the term hierarchy for hierarchy loops.
 * Prevents loops from forming and breaks those that it finds.
 *
 * Attached to the {@see 'wp_update_term_parent'} filter.
 *
 * @since 3.1.0
 *
 * @param int    $parent_term `term_id` of the parent for the term we're checking.
 * @param int    $term_id     The term we're checking.
 * @param string $taxonomy    The taxonomy of the term we're checking.
 * @return int The new parent for the term.
 */
function wp_check_term_hierarchy_for_loops( $parent_term, $term_id, $taxonomy ) {
	// Nothing fancy here - bail.
	if ( ! $parent_term ) {
		return 0;
	}

	// Can't be its own parent.
	if ( $parent_term === $term_id ) {
		return 0;
	}

	// Now look for larger loops.
	$loop = wp_find_hierarchy_loop( 'wp_get_term_taxonomy_parent_id', $term_id, $parent_term, array( $taxonomy ) );
	if ( ! $loop ) {
		return $parent_term; // No loop.
	}

	// Setting $parent_term to the given value causes a loop.
	if ( isset( $loop[ $term_id ] ) ) {
		return 0;
	}

	// There's a loop, but it doesn't contain $term_id. Break the loop.
	foreach ( array_keys( $loop ) as $loop_member ) {
		wp_update_term( $loop_member, $taxonomy, array( 'parent' => 0 ) );
	}

	return $parent_term;
}

/**
 * Determines whether a taxonomy is considered "viewable".
 *
 * @since 5.1.0
 *
 * @param string|WP_Taxonomy $taxonomy Taxonomy name or object.
 * @return bool Whether the taxonomy should be considered viewable.
 */
function is_taxonomy_viewable( $taxonomy ) {
	if ( is_scalar( $taxonomy ) ) {
		$taxonomy = get_taxonomy( $taxonomy );
		if ( ! $taxonomy ) {
			return false;
		}
	}

	return $taxonomy->publicly_queryable;
}

/**
 * Determines whether a term is publicly viewable.
 *
 * A term is considered publicly viewable if its taxonomy is viewable.
 *
 * @since 6.1.0
 *
 * @param int|WP_Term $term Term ID or term object.
 * @return bool Whether the term is publicly viewable.
 */
function is_term_publicly_viewable( $term ) {
	$term = get_term( $term );

	if ( ! $term ) {
		return false;
	}

	return is_taxonomy_viewable( $term->taxonomy );
}

/**
 * Sets the last changed time for the 'terms' cache group.
 *
 * @since 5.0.0
 */
function wp_cache_set_terms_last_changed() {
	wp_cache_set_last_changed( 'terms' );
}

/**
 * Aborts calls to term meta if it is not supported.
 *
 * @since 5.0.0
 *
 * @param mixed $check Skip-value for whether to proceed term meta function execution.
 * @return mixed Original value of $check, or false if term meta is not supported.
 */
function wp_check_term_meta_support_prefilter( $check ) {
	if ( get_option( 'db_version' ) < 34370 ) {
		return false;
	}

	return $check;
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function create_initial_taxonomies() in /home/he2a35ddd308f/public_html/wp-settings.php:565
Stack trace:
#0 /home/he2a35ddd308f/public_html/wp-config.php(75): require_once()
#1 /home/he2a35ddd308f/public_html/wp-load.php(50): require_once('/home/he2a35ddd...')
#2 /home/he2a35ddd308f/public_html/wp-blog-header.php(13): require_once('/home/he2a35ddd...')
#3 /home/he2a35ddd308f/public_html/index.php(17): require('/home/he2a35ddd...')
#4 {main}
  thrown in <b>/home/he2a35ddd308f/public_html/wp-settings.php</b> on line <b>565</b><br />