関数 delete_metadata()
2014/12/25
関数 delete_metadata()
定義ファイル :/blog/wp-includes/meta.php 1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | function delete_metadata($meta_type, $object_id, $meta_key, $meta_value = '', $delete_all = false) { global $wpdb; if ( ! $meta_type || ! $meta_key || ! is_numeric( $object_id ) && ! $delete_all ) { return false; } $object_id = absint( $object_id ); if ( ! $object_id && ! $delete_all ) { return false; } $table = _get_meta_table( $meta_type ); if ( ! $table ) { return false; } $type_column = sanitize_key($meta_type . '_id'); $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id'; // expected_slashed ($meta_key) $meta_key = wp_unslash($meta_key); $meta_value = wp_unslash($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 ); // Old-style action. if ( 'post' == $meta_type ) { /** * Fires immediately before deleting metadata for a post. * * @since 2.9.0 * * @param array $meta_ids An array of post metadata entry IDs to delete. */ 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 ); // Old-style action. if ( 'post' == $meta_type ) { /** * Fires immediately after deleting metadata for a post. * * @since 2.9.0 * * @param array $meta_ids An array of deleted post metadata entry IDs. */ do_action( 'deleted_postmeta', $meta_ids ); } return true; } |