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<?php /** * Taxonomy API: Core category-specific functionality * * @package WordPress * @subpackage Taxonomy */ /** * Retrieves a list of category objects. * * If you set the 'taxonomy' argument to 'link_category', the link categories * will be returned instead. * * @since 2.1.0 * * @see get_terms() Type of arguments that can be changed. * * @param string|array $args { * Optional. Arguments to retrieve categories. See get_terms() for additional options. * * @type string $taxonomy Taxonomy to retrieve terms for. Default 'category'. * } * @return array List of category objects. */ function get_categories( $args = '' ) { $defaults = array( 'taxonomy' => 'category' ); $args = wp_parse_args( $args, $defaults ); /** * Filters the taxonomy used to retrieve terms when calling get_categories(). * * @since 2.7.0 * * @param string $taxonomy Taxonomy to retrieve terms from. * @param array $args An array of arguments. See get_terms(). */ $args['taxonomy'] = apply_filters( 'get_categories_taxonomy', $args['taxonomy'], $args ); // Back compat. if ( isset( $args['type'] ) && 'link' === $args['type'] ) { _deprecated_argument( __FUNCTION__, '3.0.0', sprintf( /* translators: 1: "type => link", 2: "taxonomy => link_category" */ __( '%1$s is deprecated. Use %2$s instead.' ), '<code>type => link</code>', '<code>taxonomy => link_category</code>' ) ); $args['taxonomy'] = 'link_category'; } $categories = get_terms( $args ); if ( is_wp_error( $categories ) ) { $categories = array(); } else { $categories = (array) $categories; foreach ( array_keys( $categories ) as $k ) { _make_cat_compat( $categories[ $k ] ); } } return $categories; } /** * Retrieves category data given a category ID or category object. * * If you pass the $category parameter an object, which is assumed to be the * category row object retrieved the database. It will cache the category data. * * If you pass $category an integer of the category ID, then that category will * be retrieved from the database, if it isn't already cached, and pass it back. * * If you look at get_term(), then both types will be passed through several * filters and finally sanitized based on the $filter parameter value. * * @since 1.5.1 * * @param int|object $category Category ID or category row object. * @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 category fields. Default 'raw'. * @return WP_Term|array|WP_Error|null Category data in type defined by $output parameter. * Returns a WP_Term object with backwards compatible property aliases filled in. * WP_Error if $category is empty, null if it does not exist. */ function get_category( $category, $output = OBJECT, $filter = 'raw' ) { $category = get_term( $category, 'category', $output, $filter ); if ( is_wp_error( $category ) ) { return $category; } _make_cat_compat( $category ); return $category; } /** * Retrieves a category based on URL containing the category slug. * * Breaks the $category_path parameter up to get the category slug. * * Tries to find the child path and will return it. If it doesn't find a * match, then it will return the first category matching slug, if $full_match, * is set to false. If it does not, then it will return null. * * It is also possible that it will return a WP_Error object on failure. Check * for it when using this function. * * @since 2.1.0 * * @param string $category_path URL containing category slugs. * @param bool $full_match Optional. Whether full path should be matched. * @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. * @return WP_Term|array|WP_Error|null Type is based on $output value. */ function get_category_by_path( $category_path, $full_match = true, $output = OBJECT ) { $category_path = rawurlencode( urldecode( $category_path ) ); $category_path = str_replace( '%2F', '/', $category_path ); $category_path = str_replace( '%20', ' ', $category_path ); $category_paths = '/' . trim( $category_path, '/' ); $leaf_path = sanitize_title( basename( $category_paths ) ); $category_paths = explode( '/', $category_paths ); $full_path = ''; foreach ( (array) $category_paths as $pathdir ) { $full_path .= ( '' !== $pathdir ? '/' : '' ) . sanitize_title( $pathdir ); } $categories = get_terms( array( 'taxonomy' => 'category', 'get' => 'all', 'slug' => $leaf_path, ) ); if ( empty( $categories ) ) { return null; } foreach ( $categories as $category ) { $path = '/' . $leaf_path; $curcategory = $category; while ( ( 0 !== $curcategory->parent ) && ( $curcategory->parent !== $curcategory->term_id ) ) { $curcategory = get_term( $curcategory->parent, 'category' ); if ( is_wp_error( $curcategory ) ) { return $curcategory; } $path = '/' . $curcategory->slug . $path; } if ( $path === $full_path ) { $category = get_term( $category->term_id, 'category', $output ); _make_cat_compat( $category ); return $category; } } // If full matching is not required, return the first cat that matches the leaf. if ( ! $full_match ) { $category = get_term( reset( $categories )->term_id, 'category', $output ); _make_cat_compat( $category ); return $category; } } /** * Retrieves a category object by category slug. * * @since 2.3.0 * * @param string $slug The category slug. * @return object|false Category data object on success, false if not found. */ function get_category_by_slug( $slug ) { $category = get_term_by( 'slug', $slug, 'category' ); if ( $category ) { _make_cat_compat( $category ); } return $category; } /** * Retrieves the ID of a category from its name. * * @since 1.0.0 * * @param string $cat_name Category name. * @return int Category ID on success, 0 if the category doesn't exist. */ function get_cat_ID( $cat_name ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid $cat = get_term_by( 'name', $cat_name, 'category' ); if ( $cat ) { return $cat->term_id; } return 0; } /** * Retrieves the name of a category from its ID. * * @since 1.0.0 * * @param int $cat_id Category ID. * @return string Category name, or an empty string if the category doesn't exist. */ function get_cat_name( $cat_id ) { $cat_id = (int) $cat_id; $category = get_term( $cat_id, 'category' ); if ( ! $category || is_wp_error( $category ) ) { return ''; } return $category->name; } /** * Checks if a category is an ancestor of another category. * * You can use either an ID or the category object for both parameters. * If you use an integer, the category will be retrieved. * * @since 2.1.0 * * @param int|object $cat1 ID or object to check if this is the parent category. * @param int|object $cat2 The child category. * @return bool Whether $cat2 is child of $cat1. */ function cat_is_ancestor_of( $cat1, $cat2 ) { return term_is_ancestor_of( $cat1, $cat2, 'category' ); } /** * Sanitizes category data based on context. * * @since 2.3.0 * * @param object|array $category Category data. * @param string $context Optional. Default 'display'. * @return object|array Same type as $category with sanitized data for safe use. */ function sanitize_category( $category, $context = 'display' ) { return sanitize_term( $category, 'category', $context ); } /** * Sanitizes data in single category key field. * * @since 2.3.0 * * @param string $field Category key to sanitize. * @param mixed $value Category value to sanitize. * @param int $cat_id Category ID. * @param string $context What filter to use, 'raw', 'display', etc. * @return mixed Value after $value has been sanitized. */ function sanitize_category_field( $field, $value, $cat_id, $context ) { return sanitize_term_field( $field, $value, $cat_id, 'category', $context ); } /* Tags */ /** * Retrieves all post tags. * * @since 2.3.0 * * @param string|array $args { * Optional. Arguments to retrieve tags. See get_terms() for additional options. * * @type string $taxonomy Taxonomy to retrieve terms for. Default 'post_tag'. * } * @return WP_Term[]|int|WP_Error Array of 'post_tag' term objects, a count thereof, * or WP_Error if any of the taxonomies do not exist. */ function get_tags( $args = '' ) { $defaults = array( 'taxonomy' => 'post_tag' ); $args = wp_parse_args( $args, $defaults ); $tags = get_terms( $args ); if ( empty( $tags ) ) { $tags = array(); } else { /** * Filters the array of term objects returned for the 'post_tag' taxonomy. * * @since 2.3.0 * * @param WP_Term[]|int|WP_Error $tags Array of 'post_tag' term objects, a count thereof, * or WP_Error if any of the taxonomies do not exist. * @param array $args An array of arguments. See {@see get_terms()}. */ $tags = apply_filters( 'get_tags', $tags, $args ); } return $tags; } /** * Retrieves a post tag by tag ID or tag object. * * If you pass the $tag parameter an object, which is assumed to be the tag row * object retrieved from the database, it will cache the tag data. * * If you pass $tag an integer of the tag ID, then that tag will be retrieved * from the database, if it isn't already cached, and passed back. * * If you look at get_term(), both types will be passed through several filters * and finally sanitized based on the $filter parameter value. * * @since 2.3.0 * * @param int|WP_Term|object $tag A tag ID or object. * @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 tag fields. Default 'raw'. * @return WP_Term|array|WP_Error|null Tag data in type defined by $output parameter. * WP_Error if $tag is empty, null if it does not exist. */ function get_tag( $tag, $output = OBJECT, $filter = 'raw' ) { return get_term( $tag, 'post_tag', $output, $filter ); } /* Cache */ /** * Removes the category cache data based on ID. * * @since 2.1.0 * * @param int $id Category ID */ function clean_category_cache( $id ) { clean_term_cache( $id, 'category' ); } /** * Updates category structure to old pre-2.3 from new taxonomy structure. * * This function was added for the taxonomy support to update the new category * structure with the old category one. This will maintain compatibility with * plugins and themes which depend on the old key or property names. * * The parameter should only be passed a variable and not create the array or * object inline to the parameter. The reason for this is that parameter is * passed by reference and PHP will fail unless it has the variable. * * There is no return value, because everything is updated on the variable you * pass to it. This is one of the features with using pass by reference in PHP. * * @since 2.3.0 * @since 4.4.0 The `$category` parameter now also accepts a WP_Term object. * @access private * * @param array|object|WP_Term $category Category row object or array. */ function _make_cat_compat( &$category ) { if ( is_object( $category ) && ! is_wp_error( $category ) ) { $category->cat_ID = $category->term_id; $category->category_count = $category->count; $category->category_description = $category->description; $category->cat_name = $category->name; $category->category_nicename = $category->slug; $category->category_parent = $category->parent; } elseif ( is_array( $category ) && isset( $category['term_id'] ) ) { $category['cat_ID'] = &$category['term_id']; $category['category_count'] = &$category['count']; $category['category_description'] = &$category['description']; $category['cat_name'] = &$category['name']; $category['category_nicename'] = &$category['slug']; $category['category_parent'] = &$category['parent']; } }
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