nd. return false; } /** * Update the metadata cache for the specified objects. * * @since 2.9.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int|array $object_ids Array or comma delimited list of object IDs to update cache for * @return array|false Metadata cache for the specified objects, or false on failure. */ function update_meta_cache($meta_type, $object_ids) { global $wpdb; if ( ! $meta_type || ! $object_ids ) { return false; } $table = _get_meta_table( $meta_type ); if ( ! $table ) { return false; } $column = sanitize_key($meta_type . '_id'); if ( !is_array($object_ids) ) { $object_ids = preg_replace('|[^0-9,]|', '', $object_ids); $object_ids = explode(',', $object_ids); } $object_ids = array_map('intval', $object_ids); $cache_key = $meta_type . '_meta'; $ids = array(); $cache = array(); foreach ( $object_ids as $id ) { $cached_object = wp_cache_get( $id, $cache_key ); if ( false === $cached_object ) $ids[] = $id; else $cache[$id] = $cached_object; } if ( empty( $ids ) ) return $cache; // Get meta info $id_list = join( ',', $ids ); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; $meta_list = $wpdb->get_results( "SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list) ORDER BY $id_column ASC", ARRAY_A ); if ( !empty($meta_list) ) { foreach ( $meta_list as $metarow) { $mpid = intval($metarow[$column]); $mkey = $metarow['meta_key']; $mval = $metarow['meta_value']; // Force subkeys to be array type: if ( !isset($cache[$mpid]) || !is_array($cache[$mpid]) ) $cache[$mpid] = array(); if ( !isset($cache[$mpid][$mkey]) || !is_array($cache[$mpid][$mkey]) ) $cache[$mpid][$mkey] = array(); // Add a value to the current pid/key: $cache[$mpid][$mkey][] = $mval; } } foreach ( $ids as $id ) { if ( ! isset($cache[$id]) ) $cache[$id] = array(); wp_cache_add( $id, $cache[$id], $cache_key ); } return $cache; } /** * Retrieves the queue for lazy-loading metadata. * * @since 4.5.0 * * @return WP_Metadata_Lazyloader $lazyloader Metadata lazyloader queue. */ function wp_metadata_lazyloader() { static $wp_metadata_lazyloader; if ( null === $wp_metadata_lazyloader ) { $wp_metadata_lazyloader = new WP_Metadata_Lazyloader(); } return $wp_metadata_lazyloader; } /** * Given a meta query, generates SQL clauses to be appended to a main query. * * @since 3.2.0 * * @see WP_Meta_Query * * @param array $meta_query A meta query. * @param string $type Type of meta. * @param string $primary_table Primary database table name. * @param string $primary_id_column Primary ID column name. * @param object $context Optional. The main query object * @return array Associative array of `JOIN` and `WHERE` SQL. */ function get_meta_sql( $meta_query, $type, $primary_table, $primary_id_column, $context = null ) { $meta_query_obj = new WP_Meta_Query( $meta_query ); return $meta_query_obj->get_sql( $type, $primary_table, $primary_id_column, $context ); } /** * Retrieve the name of the metadata table for the specified object type. * * @since 2.9.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $type Type of object to get metadata table for (e.g., comment, post, or user) * @return string|false Metadata table name, or false if no metadata table exists */ function _get_meta_table($type) { global $wpdb; $table_name = $type . 'meta'; if ( empty($wpdb->$table_name) ) return false; return $wpdb->$table_name; } /** * Determine whether a meta key is protected. * * @since 3.1.3 * * @param string $meta_key Meta key * @param string|null $meta_type * @return bool True if the key is protected, false otherwise. */ function is_protected_meta( $meta_key, $meta_type = null ) { $protected = ( '_' == $meta_key[0] ); /** * Filters whether a meta key is protected. * * @since 3.2.0 * * @param bool $protected Whether the key is protected. Default false. * @param string $meta_key Meta key. * @param string $meta_type Meta type. */ return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type ); } /** * Sanitize meta value. * * @since 3.1.3 * @since 4.9.8 The `$object_subtype` parameter was added. * * @param string $meta_key Meta key. * @param mixed $meta_value Meta value to sanitize. * @param string $object_type Type of object the meta is registered to. * * @return mixed Sanitized $meta_value. */ function sanitize_meta( $meta_key, $meta_value, $object_type, $object_subtype = '' ) { if ( ! empty( $object_subtype ) && has_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}" ) ) { /** * Filters the sanitization of a specific meta key of a specific meta type and subtype. * * The dynamic portions of the hook name, `$object_type`, `$meta_key`, * and `$object_subtype`, refer to the metadata object type (comment, post, term or user), * the meta key value, and the object subtype respectively. * * @since 4.9.8 * * @param mixed $meta_value Meta value to sanitize. * @param string $meta_key Meta key. * @param string $object_type Object type. * @param string $object_subtype Object subtype. */ return apply_filters( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $meta_value, $meta_key, $object_type, $object_subtype ); } /** * Filters the sanitization of a specific meta key of a specific meta type. * * The dynamic portions of the hook name, `$meta_type`, and `$meta_key`, * refer to the metadata object type (comment, post, or user) and the meta * key value, respectively. * * @since 3.3.0 * * @param mixed $meta_value Meta value to sanitize. * @param string $meta_key Meta key. * @param string $object_type Object type. */ return apply_filters( "sanitize_{$object_type}_meta_{$meta_key}", $meta_value, $meta_key, $object_type ); } /** * Registers a meta key. * * It is recommended to register meta keys for a specific combination of object type and object subtype. If passing * an object subtype is omitted, the meta key will be registered for the entire object type, however it can be partly * overridden in case a more specific meta key of the same name exists for the same object type and a subtype. * * If an object type does not support any subtypes, such as users or comments, you should commonly call this function * without passing a subtype. * * @since 3.3.0 * @since 4.6.0 {@link https://core.trac.wordpress.org/ticket/35658 Modified * to support an array of data to attach to registered meta keys}. Previous arguments for * `$sanitize_callback` and `$auth_callback` have been folded into this array. * @since 4.9.8 The `$object_subtype` argument was added to the arguments array. * * @param string $object_type Type of object this meta is registered to. * @param string $meta_key Meta key to register. * @param array $args { * Data used to describe the meta key when registered. * * @type string $object_subtype A subtype; e.g. if the object type is "post", the post type. If left empty, * the meta key will be registered on the entire object type. Default empty. * @type string $type The type of data associated with this meta key. * Valid values are 'string', 'boolean', 'integer', and 'number'. * @type string $description A description of the data attached to this meta key. * @type bool $single Whether the meta key has one value per object, or an array of values per object. * @type string $sanitize_callback A function or method to call when sanitizing `$meta_key` data. * @type string $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks. * @type bool $show_in_rest Whether data associated with this meta key can be considered public. * } * @param string|array $deprecated Deprecated. Use `$args` instead. * * @return bool True if the meta key was successfully registered in the global array, false if not. * Registering a meta key with distinct sanitize and auth callbacks will fire those * callbacks, but will not add to the global registry. */ function register_meta( $object_type, $meta_key, $args, $deprecated = null ) { global $wp_meta_keys; if ( ! is_array( $wp_meta_keys ) ) { $wp_meta_keys = array(); } $defaults = array( 'object_subtype' => '', 'type' => 'string', 'description' => '', 'single' => false, 'sanitize_callback' => null, 'auth_callback' => null, 'show_in_rest' => false, ); // There used to be individual args for sanitize and auth callbacks $has_old_sanitize_cb = false; $has_old_auth_cb = false; if ( is_callable( $args ) ) { $args = array( 'sanitize_callback' => $args, ); $has_old_sanitize_cb = true; } else { $args = (array) $args; } if ( is_callable( $deprecated ) ) { $args['auth_callback'] = $deprecated; $has_old_auth_cb = true; } /** * Filters the registration arguments when registering meta. * * @since 4.6.0 * * @param array $args Array of meta registration arguments. * @param array $defaults Array of default arguments. * @param string $object_type Object type. * @param string $meta_key Meta key. */ $args = apply_filters( 'register_meta_args', $args, $defaults, $object_type, $meta_key ); $args = wp_parse_args( $args, $defaults ); $object_subtype = ! empty( $args['object_subtype'] ) ? $args['object_subtype'] : ''; // If `auth_callback` is not provided, fall back to `is_protected_meta()`. if ( empty( $args['auth_callback'] ) ) { if ( is_protected_meta( $meta_key, $object_type ) ) { $args['auth_callback'] = '__return_false'; } else { $args['auth_callback'] = '__return_true'; } } // Back-compat: old sanitize and auth callbacks are applied to all of an object type. if ( is_callable( $args['sanitize_callback'] ) ) { if ( ! empty( $object_subtype ) ) { add_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'], 10, 4 ); } else { add_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'], 10, 3 ); } } if ( is_callable( $args['auth_callback'] ) ) { if ( ! empty( $object_subtype ) ) { add_filter( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['auth_callback'], 10, 6 ); } else { add_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'], 10, 6 ); } } // Global registry only contains meta keys registered with the array of arguments added in 4.6.0. if ( ! $has_old_auth_cb && ! $has_old_sanitize_cb ) { unset( $args['object_subtype'] ); $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ] = $args; return true; } return false; } /** * Checks if a meta key is registered. * * @since 4.6.0 * @since 4.9.8 The `$object_subtype` parameter was added. * * @param string $object_type The type of object. * @param string $meta_key The meta key. * @param string $object_subtype Optional. The subtype of the object type. * * @return bool True if the meta key is registered to the object type and, if provided, * the object subtype. False if not. */ function registered_meta_key_exists( $object_type, $meta_key, $object_subtype = '' ) { $meta_keys = get_registered_meta_keys( $object_type, $object_subtype ); return isset( $meta_keys[ $meta_key ] ); } /** * Unregisters a meta key from the list of registered keys. * * @since 4.6.0 * @since 4.9.8 The `$object_subtype` parameter was added. * * @param string $object_type The type of object. * @param string $meta_key The meta key. * @param string $object_subtype Optional. The subtype of the object type. * @return bool True if successful. False if the meta key was not registered. */ function unregister_meta_key( $object_type, $meta_key, $object_subtype = '' ) { global $wp_meta_keys; if ( ! registered_meta_key_exists( $object_type, $meta_key, $object_subtype ) ) { return false; } $args = $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ]; if ( isset( $args['sanitize_callback'] ) && is_callable( $args['sanitize_callback'] ) ) { if ( ! empty( $object_subtype ) ) { remove_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'] ); } else { remove_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'] ); } } if ( isset( $args['auth_callback'] ) && is_callable( $args['auth_callback'] ) ) { if ( ! empty( $object_subtype ) ) { remove_filter( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['auth_callback'] ); } else { remove_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'] ); } } unset( $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ] ); // Do some clean up if ( empty( $wp_meta_keys[ $object_type ][ $object_subtype ] ) ) { unset( $wp_meta_keys[ $object_type ][ $object_subtype ] ); } if ( empty( $wp_meta_keys[ $object_type ] ) ) { unset( $wp_meta_keys[ $object_type ] ); } return true; } /** * Retrieves a list of registered meta keys for an object type. * * @since 4.6.0 * @since 4.9.8 The `$object_subtype` parameter was added. * * @param string $object_type The type of object. Post, comment, user, term. * @param string $object_subtype Optional. The subtype of the object type. * @return array List of registered meta keys. */ function get_registered_meta_keys( $object_type, $object_subtype = '' ) { global $wp_meta_keys; if ( ! is_array( $wp_meta_keys ) || ! isset( $wp_meta_keys[ $object_type ] ) || ! isset( $wp_meta_keys[ $object_type ][ $object_subtype ] ) ) { return array(); } return $wp_meta_keys[ $object_type ][ $object_subtype ]; } /** * Retrieves registered metadata for a specified object. * * The results include both meta that is registered specifically for the * object's subtype and meta that is registered for the entire object type. * * @since 4.6.0 * * @param string $object_type Type of object to request metadata for. (e.g. comment, post, term, user) * @param int $object_id ID of the object the metadata is for. * @param string $meta_key Optional. Registered metadata key. If not specified, retrieve all registered * metadata for the specified object. * @return mixed A single value or array of values for a key if specified. An array of all registered keys * and values for an object ID if not. False if a given $meta_key is not registered. */ function get_registered_metadata( $object_type, $object_id, $meta_key = '' ) { $object_subtype = get_object_subtype( $object_type, $object_id ); if ( ! empty( $meta_key ) ) { if ( ! empty( $object_subtype ) && ! registered_meta_key_exists( $object_type, $meta_key, $object_subtype ) ) { $object_subtype = ''; } if ( ! registered_meta_key_exists( $object_type, $meta_key, $object_subtype ) ) { return false; } $meta_keys = get_registered_meta_keys( $object_type, $object_subtype ); $meta_key_data = $meta_keys[ $meta_key ]; $data = get_metadata( $object_type, $object_id, $meta_key, $meta_key_data['single'] ); return $data; } $data = get_metadata( $object_type, $object_id ); if ( ! $data ) { return array(); } $meta_keys = get_registered_meta_keys( $object_type ); if ( ! empty( $object_subtype ) ) { $meta_keys = array_merge( $meta_keys, get_registered_meta_keys( $object_type, $object_subtype ) ); } return array_intersect_key( $data, $meta_keys ); } /** * Filter out `register_meta()` args based on a whitelist. * `register_meta()` args may change over time, so requiring the whitelist * to be explicitly turned off is a warranty seal of sorts. * * @access private * @since 4.6.0 * * @param array $args Arguments from `register_meta()`. * @param array $default_args Default arguments for `register_meta()`. * * @return array Filtered arguments. */ function _wp_register_meta_args_whitelist( $args, $default_args ) { return array_intersect_key( $args, $default_args ); } /** * Returns the object subtype for a given object ID of a specific type. * * @since 4.9.8 * * @param string $object_type Type of object to request metadata for. (e.g. comment, post, term, user) * @param int $object_id ID of the object to retrieve its subtype. * @return string The object subtype or an empty string if unspecified subtype. */ function get_object_subtype( $object_type, $object_id ) { $object_id = (int) $object_id; $object_subtype = ''; switch ( $object_type ) { case 'post': $post_type = get_post_type( $object_id ); if ( ! empty( $post_type ) ) { $object_subtype = $post_type; } break; case 'term': $term = get_term( $object_id ); if ( ! $term instanceof WP_Term ) { break; } $object_subtype = $term->taxonomy; break; case 'comment': $comment = get_comment( $object_id ); if ( ! $comment ) { break; } $object_subtype = 'comment'; break; case 'user': $user = get_user_by( 'id', $object_id ); if ( ! $user ) { break; } $object_subtype = 'user'; break; } /** * Filters the object subtype identifier for a non standard object type. * * The dynamic portion of the hook, `$object_type`, refers to the object * type (post, comment, term, or user). * * @since 4.9.8 * * @param string $object_subtype Empty string to override. * @param int $object_id ID of the object to get the subtype for. */ return apply_filters( "get_object_subtype_{$object_type}", $object_subtype, $object_id ); }
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