X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/16b9f61a8ab25bd6c9fbfd0cea00c7bda22f6a71..a01a150d87a096c70b6ec80332b7ce89c943eefe:/wp-includes/meta.php diff --git a/wp-includes/meta.php b/wp-includes/meta.php index de34eef0..fe11d0a8 100644 --- a/wp-includes/meta.php +++ b/wp-includes/meta.php @@ -1,18 +1,40 @@ insert( $table, array( @@ -37,16 +60,41 @@ function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = ) ); wp_cache_delete($object_id, $meta_type . '_meta'); + // users cache stores usermeta that must be cleared. + if ( 'user' == $meta_type ) + clean_user_cache($object_id); - do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $meta_value ); + do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $_meta_value ); return true; } +/** + * 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; @@ -61,6 +109,16 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v 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, $meta_value); + // Compare existing value to new value if no prev value given and the key exists only once. + if ( empty($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; $meta_value = maybe_serialize( stripslashes_deep($meta_value) ); $data = compact( 'meta_value' ); @@ -71,18 +129,42 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v $where['meta_value'] = $prev_value; } - do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value ); + do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); $wpdb->update( $table, $data, $where ); wp_cache_delete($object_id, $meta_type . '_meta'); + // users cache stores usermeta that must be cleared. + if ( 'user' == $meta_type ) + clean_user_cache($object_id); - do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $meta_value ); + do_action( "updated_{$meta_type}_meta", $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 || !$meta_key || (!$delete_all && ! (int)$object_id) ) + if ( !$meta_type || !$meta_key ) + return false; + + if ( (!$object_id = absint($object_id)) && !$delete_all ) return false; if ( ! $table = _get_meta_table($meta_type) ) @@ -116,16 +198,35 @@ function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $d return false; wp_cache_delete($object_id, $meta_type . '_meta'); + // users cache stores usermeta that must be cleared. + if ( 'user' == $meta_type ) + clean_user_cache($object_id); do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $meta_value ); 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; + $meta_cache = wp_cache_get($object_id, $meta_type . '_meta'); if ( !$meta_cache ) { @@ -137,11 +238,10 @@ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) { return $meta_cache; if ( isset($meta_cache[$meta_key]) ) { - if ( $single ) { + if ( $single ) return maybe_unserialize( $meta_cache[$meta_key][0] ); - } else { + else return array_map('maybe_unserialize', $meta_cache[$meta_key]); - } } if ($single) @@ -150,6 +250,16 @@ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) { return array(); } +/** + * 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( $object_ids ) ) return false; @@ -212,6 +322,15 @@ function update_meta_cache($meta_type, $object_ids) { return $cache; } +/** + * 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 $meta_type Type of object to get metadata table for (e.g., comment, post, or user) + * @return mixed Metadata table name, or false if no metadata table exists + */ function _get_meta_table($type) { global $wpdb;