/** * Metadata API * * Functions for retrieving and manipulating metadata of various WordPress object types. Metadata * for an object is a represented by a simple key-value pair. Objects may contain multiple * metadata entries that share the same key and differ only in their value. * * @package WordPress * @subpackage Meta * @since 2.9.0 */ /** * Add metadata for the specified object. * * @since 2.9.0 * @uses $wpdb WordPress database object for queries. * @uses do_action() Calls 'added_{$meta_type}_meta' with meta_id of added metadata entry, * object ID, meta key, and meta value * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $object_id ID of the object metadata is for * @param string $meta_key Metadata key * @param string $meta_value Metadata value * @param bool $unique Optional, default is false. Whether the specified metadata key should be * unique for the object. If true, and the object already has a value for the specified * metadata key, no change will be made * @return bool The meta ID on successful update, false on failure. */ function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) { if ( !$meta_type || !$meta_key ) return false; if ( !$object_id = absint($object_id) ) return false; if ( ! $table = _get_meta_table($meta_type) ) return false; global $wpdb; $column = esc_sql($meta_type . '_id'); // expected_slashed ($meta_key) $meta_key = stripslashes($meta_key); $meta_value = stripslashes_deep($meta_value); $meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type ); $check = apply_filters( "add_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $unique ); if ( null !== $check ) return $check; if ( $unique && $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) ) return false; $_meta_value = $meta_value; $meta_value = maybe_serialize( $meta_value ); do_action( "add_{$meta_type}_meta", $object_id, $meta_key, $_meta_value ); $result = $wpdb->insert( $table, array( $column => $object_id, 'meta_key' => $meta_key, 'meta_value' => $meta_value ) ); if ( ! $result ) return false; $mid = (int) $wpdb->insert_id; wp_cache_delete($object_id, $meta_type . '_meta'); do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value ); return $mid; } /** * Update metadata for the specified object. If no value already exists for the specified object * ID and metadata key, the metadata will be added. * * @since 2.9.0 * @uses $wpdb WordPress database object for queries. * @uses do_action() Calls 'update_{$meta_type}_meta' before updating metadata with meta_id of * metadata entry to update, object ID, meta key, and meta value * @uses do_action() Calls 'updated_{$meta_type}_meta' after updating metadata with meta_id of * updated metadata entry, object ID, meta key, and meta value * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $object_id ID of the object metadata is for * @param string $meta_key Metadata key * @param string $meta_value Metadata value * @param string $prev_value Optional. If specified, only update existing metadata entries with * the specified value. Otherwise, update all entries. * @return bool True on successful update, false on failure. */ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_value = '') { if ( !$meta_type || !$meta_key ) return false; if ( !$object_id = absint($object_id) ) return false; if ( ! $table = _get_meta_table($meta_type) ) return false; global $wpdb; $column = esc_sql($meta_type . '_id'); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; // expected_slashed ($meta_key) $meta_key = stripslashes($meta_key); $passed_value = $meta_value; $meta_value = stripslashes_deep($meta_value); $meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type ); $check = apply_filters( "update_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $prev_value ); if ( null !== $check ) return (bool) $check; if ( ! $meta_id = $wpdb->get_var( $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s AND $column = %d", $meta_key, $object_id ) ) ) return add_metadata($meta_type, $object_id, $meta_key, $passed_value); // Compare existing value to new value if no prev value given and the key exists only once. if ( empty($prev_value) ) { $old_value = get_metadata($meta_type, $object_id, $meta_key); if ( count($old_value) == 1 ) { if ( $old_value[0] === $meta_value ) return false; } } $_meta_value = $meta_value; $meta_value = maybe_serialize( $meta_value ); $data = compact( 'meta_value' ); $where = array( $column => $object_id, 'meta_key' => $meta_key ); if ( !empty( $prev_value ) ) { $prev_value = maybe_serialize($prev_value); $where['meta_value'] = $prev_value; } do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); $wpdb->update( $table, $data, $where ); wp_cache_delete($object_id, $meta_type . '_meta'); do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); return true; } /** * Delete metadata for the specified object. * * @since 2.9.0 * @uses $wpdb WordPress database object for queries. * @uses do_action() Calls 'deleted_{$meta_type}_meta' after deleting with meta_id of * deleted metadata entries, object ID, meta key, and meta value * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $object_id ID of the object metadata is for * @param string $meta_key Metadata key * @param string $meta_value Optional. Metadata value. If specified, only delete metadata entries * with this value. Otherwise, delete all entries with the specified meta_key. * @param bool $delete_all Optional, default is false. If true, delete matching metadata entries * for all objects, ignoring the specified object_id. Otherwise, only delete matching * metadata entries for the specified object_id. * @return bool True on successful delete, false on failure. */ function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $delete_all = false) { if ( !$meta_type || !$meta_key ) return false; if ( (!$object_id = absint($object_id)) && !$delete_all ) return false; if ( ! $table = _get_meta_table($meta_type) ) return false; global $wpdb; $type_column = esc_sql($meta_type . '_id'); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; // expected_slashed ($meta_key) $meta_key = stripslashes($meta_key); $meta_value = stripslashes_deep($meta_value); $check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all ); if ( null !== $check ) return (bool) $check; $_meta_value = $meta_value; $meta_value = maybe_serialize( $meta_value ); $query = $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s", $meta_key ); if ( !$delete_all ) $query .= $wpdb->prepare(" AND $type_column = %d", $object_id ); if ( $meta_value ) $query .= $wpdb->prepare(" AND meta_value = %s", $meta_value ); $meta_ids = $wpdb->get_col( $query ); if ( !count( $meta_ids ) ) return false; if ( $delete_all ) $object_ids = $wpdb->get_col( $wpdb->prepare( "SELECT $type_column FROM $table WHERE meta_key = %s", $meta_key ) ); do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'delete_postmeta', $meta_ids ); $query = "DELETE FROM $table WHERE $id_column IN( " . implode( ',', $meta_ids ) . " )"; $count = $wpdb->query($query); if ( !$count ) return false; if ( $delete_all ) { foreach ( (array) $object_ids as $o_id ) { wp_cache_delete($o_id, $meta_type . '_meta'); } } else { wp_cache_delete($object_id, $meta_type . '_meta'); } do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'deleted_postmeta', $meta_ids ); return true; } /** * Retrieve metadata for the specified object. * * @since 2.9.0 * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $object_id ID of the object metadata is for * @param string $meta_key Optional. Metadata key. If not specified, retrieve all metadata for * the specified object. * @param bool $single Optional, default is false. If true, return only the first value of the * specified meta_key. This parameter has no effect if meta_key is not specified. * @return string|array Single metadata value, or array of values */ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) { if ( !$meta_type ) return false; if ( !$object_id = absint($object_id) ) return false; $check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, $single ); if ( null !== $check ) { if ( $single && is_array( $check ) ) return $check[0]; else return $check; } $meta_cache = wp_cache_get($object_id, $meta_type . '_meta'); if ( !$meta_cache ) { $meta_cache = update_meta_cache( $meta_type, array( $object_id ) ); $meta_cache = $meta_cache[$object_id]; } if ( !$meta_key ) return $meta_cache; if ( isset($meta_cache[$meta_key]) ) { if ( $single ) return maybe_unserialize( $meta_cache[$meta_key][0] ); else return array_map('maybe_unserialize', $meta_cache[$meta_key]); } if ($single) return ''; else return array(); } /** * Determine if a meta key is set for a given object * * @since 3.3.0 * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $object_id ID of the object metadata is for * @param string $meta_key Metadata key. * @return boolean true of the key is set, false if not. */ function metadata_exists( $meta_type, $object_id, $meta_key ) { if ( ! $meta_type ) return false; if ( ! $object_id = absint( $object_id ) ) return false; $check = apply_filters( "get_{$meta_type}_metadata", null, $object_id, $meta_key, true ); if ( null !== $check ) return true; $meta_cache = wp_cache_get( $object_id, $meta_type . '_meta' ); if ( !$meta_cache ) { $meta_cache = update_meta_cache( $meta_type, array( $object_id ) ); $meta_cache = $meta_cache[$object_id]; } if ( isset( $meta_cache[ $meta_key ] ) ) return true; return false; } /** * Get meta data by meta ID * * @since 3.3.0 * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $meta_id ID for a specific meta row * @return object Meta object or false. */ function get_metadata_by_mid( $meta_type, $meta_id ) { global $wpdb; if ( ! $meta_type ) return false; if ( !$meta_id = absint( $meta_id ) ) return false; if ( ! $table = _get_meta_table($meta_type) ) return false; $id_column = ( 'user' == $meta_type ) ? 'umeta_id' : 'meta_id'; $meta = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $table WHERE $id_column = %d", $meta_id ) ); if ( empty( $meta ) ) return false; if ( isset( $meta->meta_value ) ) $meta->meta_value = maybe_unserialize( $meta->meta_value ); return $meta; } /** * Update meta data by meta ID * * @since 3.3.0 * * @uses get_metadata_by_mid() Calls get_metadata_by_mid() to fetch the meta key, value * and object_id of the given meta_id. * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $meta_id ID for a specific meta row * @param string $meta_value Metadata value * @param string $meta_key Optional, you can provide a meta key to update it * @return bool True on successful update, false on failure. */ function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = false ) { global $wpdb; // Make sure everything is valid. if ( ! $meta_type ) return false; if ( ! $meta_id = absint( $meta_id ) ) return false; if ( ! $table = _get_meta_table( $meta_type ) ) return false; $column = esc_sql($meta_type . '_id'); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; // Fetch the meta and go on if it's found. if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) { $original_key = $meta->meta_key; $original_value = $meta->meta_value; $object_id = $meta->{$column}; // If a new meta_key (last parameter) was specified, change the meta key, // otherwise use the original key in the update statement. if ( false === $meta_key ) { $meta_key = $original_key; } elseif ( ! is_string( $meta_key ) ) { return false; } // Sanitize the meta $_meta_value = $meta_value; $meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type ); $meta_value = maybe_serialize( $meta_value ); // Format the data query arguments. $data = array( 'meta_key' => $meta_key, 'meta_value' => $meta_value ); // Format the where query arguments. $where = array(); $where[$id_column] = $meta_id; do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); // Run the update query, all fields in $data are %s, $where is a %d. $result = (bool) $wpdb->update( $table, $data, $where, '%s', '%d' ); // Clear the caches. wp_cache_delete($object_id, $meta_type . '_meta'); do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); if ( 'post' == $meta_type ) do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); return $result; } // And if the meta was not found. return false; } /** * Delete meta data by meta ID * * @since 3.3.0 * * @uses get_metadata_by_mid() Calls get_metadata_by_mid() to fetch the meta key, value * and object_id of the given meta_id. * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int $meta_id ID for a specific meta row * @return bool True on successful delete, false on failure. */ function delete_metadata_by_mid( $meta_type, $meta_id ) { global $wpdb; // Make sure everything is valid. if ( ! $meta_type ) return false; if ( ! $meta_id = absint( $meta_id ) ) return false; if ( ! $table = _get_meta_table( $meta_type ) ) return false; // object and id columns $column = esc_sql($meta_type . '_id'); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; // Fetch the meta and go on if it's found. if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) { $object_id = $meta->{$column}; do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); if ( 'post' == $meta_type ) do_action( 'delete_postmeta', $meta_id ); // Run the query, will return true if deleted, false otherwise $result = (bool) $wpdb->query( $wpdb->prepare( "DELETE FROM $table WHERE $id_column = %d LIMIT 1;", $meta_id ) ); // Clear the caches. wp_cache_delete($object_id, $meta_type . '_meta'); do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); if ( 'post' == $meta_type ) do_action( 'deleted_postmeta', $meta_id ); return $result; } // Meta id was not found. return false; } /** * Update the metadata cache for the specified objects. * * @since 2.9.0 * @uses $wpdb WordPress database object for queries. * * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user) * @param int|array $object_ids array or comma delimited list of object IDs to update cache for * @return mixed Metadata cache for the specified objects, or false on failure. */ function update_meta_cache($meta_type, $object_ids) { if ( empty( $meta_type ) || empty( $object_ids ) ) return false; if ( ! $table = _get_meta_table($meta_type) ) return false; $column = esc_sql($meta_type . '_id'); global $wpdb; if ( !is_array($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); $meta_list = $wpdb->get_results( $wpdb->prepare("SELECT $column, meta_key, meta_value FROM $table WHERE $column IN ($id_list)", $meta_type), ARRAY_A ); if ( !empty($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; } /** * 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 * @param string $primary_id_column * @param object $context (optional) The main query object * @return array( 'join' => $join_sql, 'where' => $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 ); } /** * Container class for a multiple metadata query * * @since 3.2.0 */ class WP_Meta_Query { /** * List of metadata queries. A single query is an associative array: * - 'key' string The meta key * - 'value' string|array The meta value * - 'compare' (optional) string How to compare the key to the value. * Possible values: '=', '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN'. * Default: '=' * - 'type' string (optional) The type of the value. * Possible values: 'NUMERIC', 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED'. * Default: 'CHAR' * * @since 3.2.0 * @access public * @var array */ public $queries = array(); /** * The relation between the queries. Can be one of 'AND' or 'OR'. * * @since 3.2.0 * @access public * @var string */ public $relation; /** * Constructor * * @param array $meta_query (optional) A meta query */ function __construct( $meta_query = false ) { if ( !$meta_query ) return; if ( isset( $meta_query['relation'] ) && strtoupper( $meta_query['relation'] ) == 'OR' ) { $this->relation = 'OR'; } else { $this->relation = 'AND'; } $this->queries = array(); foreach ( $meta_query as $key => $query ) { if ( ! is_array( $query ) ) continue; $this->queries[] = $query; } } /** * Constructs a meta query based on 'meta_*' query vars * * @since 3.2.0 * @access public * * @param array $qv The query variables */ function parse_query_vars( $qv ) { $meta_query = array(); // Simple query needs to be first for orderby=meta_value to work correctly foreach ( array( 'key', 'compare', 'type' ) as $key ) { if ( !empty( $qv[ "meta_$key" ] ) ) $meta_query[0][ $key ] = $qv[ "meta_$key" ]; } // WP_Query sets 'meta_value' = '' by default if ( isset( $qv[ 'meta_value' ] ) && '' !== $qv[ 'meta_value' ] ) $meta_query[0]['value'] = $qv[ 'meta_value' ]; if ( !empty( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ) { $meta_query = array_merge( $meta_query, $qv['meta_query'] ); } $this->__construct( $meta_query ); } /** * Generates SQL clauses to be appended to a main query. * * @since 3.2.0 * @access public * * @param string $type Type of meta * @param string $primary_table * @param string $primary_id_column * @param object $context (optional) The main query object * @return array( 'join' => $join_sql, 'where' => $where_sql ) */ function get_sql( $type, $primary_table, $primary_id_column, $context = null ) { global $wpdb; if ( ! $meta_table = _get_meta_table( $type ) ) return false; $meta_id_column = esc_sql( $type . '_id' ); $join = array(); $where = array(); foreach ( $this->queries as $k => $q ) { $meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : ''; $meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR'; if ( 'NUMERIC' == $meta_type ) $meta_type = 'SIGNED'; elseif ( ! in_array( $meta_type, array( 'BINARY', 'CHAR', 'DATE', 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', 'UNSIGNED' ) ) ) $meta_type = 'CHAR'; $i = count( $join ); $alias = $i ? 'mt' . $i : $meta_table; // Set JOIN $join[$i] = "INNER JOIN $meta_table"; $join[$i] .= $i ? " AS $alias" : ''; $join[$i] .= " ON ($primary_table.$primary_id_column = $alias.$meta_id_column)"; $where[$k] = ''; if ( !empty( $meta_key ) ) $where[$k] = $wpdb->prepare( "$alias.meta_key = %s", $meta_key ); if ( !isset( $q['value'] ) ) { if ( empty( $where[$k] ) ) unset( $join[$i] ); continue; } $meta_value = $q['value']; $meta_compare = is_array( $meta_value ) ? 'IN' : '='; if ( isset( $q['compare'] ) ) $meta_compare = strtoupper( $q['compare'] ); if ( ! in_array( $meta_compare, array( '=', '!=', '>', '>=', '<', '<=', 'LIKE', 'NOT LIKE', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) $meta_compare = '='; if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) { if ( ! is_array( $meta_value ) ) $meta_value = preg_split( '/[,\s]+/', $meta_value ); if ( empty( $meta_value ) ) { unset( $join[$i] ); continue; } } else { $meta_value = trim( $meta_value ); } if ( 'IN' == substr( $meta_compare, -2) ) { $meta_compare_string = '(' . substr( str_repeat( ',%s', count( $meta_value ) ), 1 ) . ')'; } elseif ( 'BETWEEN' == substr( $meta_compare, -7) ) { $meta_value = array_slice( $meta_value, 0, 2 ); $meta_compare_string = '%s AND %s'; } elseif ( 'LIKE' == substr( $meta_compare, -4 ) ) { $meta_value = '%' . like_escape( $meta_value ) . '%'; $meta_compare_string = '%s'; } else { $meta_compare_string = '%s'; } if ( ! empty( $where[$k] ) ) $where[$k] .= ' AND '; $where[$k] = ' (' . $where[$k] . $wpdb->prepare( "CAST($alias.meta_value AS {$meta_type}) {$meta_compare} {$meta_compare_string})", $meta_value ); } $where = array_filter( $where ); if ( empty( $where ) ) $where = ''; else $where = ' AND (' . implode( "\n{$this->relation} ", $where ) . ' )'; $join = implode( "\n", $join ); if ( ! empty( $join ) ) $join = ' ' . $join; return apply_filters_ref_array( 'get_meta_sql', array( compact( 'join', 'where' ), $this->queries, $type, $primary_table, $primary_id_column, $context ) ); } } /** * Retrieve the name of the metadata table for the specified object type. * * @since 2.9.0 * @uses $wpdb WordPress database object for queries. * * @param string $type Type of object to get metadata table for (e.g., comment, post, or user) * @return mixed Metadata table name, or false if no metadata table exists */ function _get_meta_table($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 * @return bool True if the key is protected, false otherwise. */ function is_protected_meta( $meta_key, $meta_type = null ) { $protected = ( '_' == $meta_key[0] ); return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type ); } /** * Sanitize meta value * * @since 3.1.3 * * @param string $meta_key Meta key * @param mixed $meta_value Meta value to sanitize * @param string $meta_type Type of meta * @return mixed Sanitized $meta_value */ function sanitize_meta( $meta_key, $meta_value, $meta_type ) { return apply_filters( "sanitize_{$meta_type}_meta_{$meta_key}", $meta_value, $meta_key, $meta_type ); } /** * Register meta key * * @since 3.3.0 * * @param string $meta_type Type of meta * @param string $meta_key Meta key * @param string|array $sanitize_callback A function or method to call when sanitizing the value of $meta_key. * @param string|array $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks. * @param array $args Arguments */ function register_meta( $meta_type, $meta_key, $sanitize_callback, $auth_callback = null ) { if ( is_callable( $sanitize_callback ) ) add_filter( "sanitize_{$meta_type}_meta_{$meta_key}", $sanitize_callback, 10, 3 ); if ( empty( $auth_callback ) ) { if ( is_protected_meta( $meta_key, $meta_type ) ) $auth_callback = '__return_false'; else $auth_callback = '__return_true'; } if ( is_callable( $auth_callback ) ) add_filter( "auth_{$meta_type}_meta_{$meta_key}", $auth_callback, 10, 6 ); } ?> /** * BackPress script procedural API. * * @package BackPress * @since r16 */ /** * Prints script tags in document head. * * Called by admin-header.php and by wp_head hook. Since it is called by wp_head * on every page load, the function does not instantiate the WP_Scripts object * unless script names are explicitly passed. Does make use of already * instantiated $wp_scripts if present. Use provided wp_print_scripts hook to * register/enqueue new scripts. * * @since r16 * @see WP_Dependencies::print_scripts() */ function wp_print_scripts( $handles = false ) { do_action( 'wp_print_scripts' ); if ( '' === $handles ) // for wp_head $handles = false; global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); if ( !$handles ) return array(); // No need to instantiate if nothing is there. else $wp_scripts = new WP_Scripts(); } return $wp_scripts->do_items( $handles ); } /** * Register new Javascript file. * * @since r16 * @param string $handle Script name * @param string $src Script url * @param array $deps (optional) Array of script names on which this script depends * @param string|bool $ver (optional) Script version (used for cache busting), set to NULL to disable * @param bool $in_footer (optional) Whether to enqueue the script before or before * @return null */ function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); $wp_scripts = new WP_Scripts(); } $wp_scripts->add( $handle, $src, $deps, $ver ); if ( $in_footer ) $wp_scripts->add_data( $handle, 'group', 1 ); } /** * Wrapper for $wp_scripts->localize(). * * Used to localizes a script. * Works only if the script has already been added. * Accepts an associative array $l10n and creates JS object: * "$object_name" = { * key: value, * key: value, * ... * } * See http://core.trac.wordpress.org/ticket/11520 for more information. * * @since r16 * * @param string $handle The script handle that was registered or used in script-loader * @param string $object_name Name for the created JS object. This is passed directly so it should be qualified JS variable /[a-zA-Z0-9_]+/ * @param array $l10n Associative PHP array containing the translated strings. HTML entities will be converted and the array will be JSON encoded. * @return bool Whether the localization was added successfully. */ function wp_localize_script( $handle, $object_name, $l10n ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); return false; } return $wp_scripts->localize( $handle, $object_name, $l10n ); } /** * Remove a registered script. * * @since r16 * @see WP_Scripts::remove() For parameter information. */ function wp_deregister_script( $handle ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); $wp_scripts = new WP_Scripts(); } $wp_scripts->remove( $handle ); } /** * Enqueues script. * * Registers the script if src provided (does NOT overwrite) and enqueues. * * @since r16 * @see wp_register_script() For parameter information. */ function wp_enqueue_script( $handle, $src = false, $deps = array(), $ver = false, $in_footer = false ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); $wp_scripts = new WP_Scripts(); } if ( $src ) { $_handle = explode('?', $handle); $wp_scripts->add( $_handle[0], $src, $deps, $ver ); if ( $in_footer ) $wp_scripts->add_data( $_handle[0], 'group', 1 ); } $wp_scripts->enqueue( $handle ); } /** * Remove an enqueued script. * * @since WP 3.1 * @see WP_Scripts::dequeue() For parameter information. */ function wp_dequeue_script( $handle ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); $wp_scripts = new WP_Scripts(); } $wp_scripts->dequeue( $handle ); } /** * Check whether script has been added to WordPress Scripts. * * The values for list defaults to 'queue', which is the same as enqueue for * scripts. * * @since WP unknown; BP unknown * * @param string $handle Handle used to add script. * @param string $list Optional, defaults to 'queue'. Others values are 'registered', 'queue', 'done', 'to_do' * @return bool */ function wp_script_is( $handle, $list = 'queue' ) { global $wp_scripts; if ( ! is_a( $wp_scripts, 'WP_Scripts' ) ) { if ( ! did_action( 'init' ) ) _doing_it_wrong( __FUNCTION__, sprintf( __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ), 'wp_enqueue_scripts', 'admin_enqueue_scripts', 'init' ), '3.3' ); $wp_scripts = new WP_Scripts(); } $query = $wp_scripts->query( $handle, $list ); if ( is_object( $query ) ) return true; return $query; }
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