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Source View: delete_{$meta_type}_metadata

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Line Code
338       *
339       * @param null|bool $delete     Whether to allow metadata deletion of the given type.
340       * @param int       $object_id  Object ID.
341       * @param string    $meta_key   Meta key.
342       * @param mixed     $meta_value Meta value. Must be serializable if non-scalar.
343       * @param bool      $delete_all Whether to delete the matching metadata entries
344       *                              for all objects, ignoring the specified $object_id.
345       *                              Default false.
346       */
347      $check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all );
348      if ( null !== $check )
349           return (bool) $check;
351      $_meta_value = $meta_value;
352      $meta_value = maybe_serialize( $meta_value );
354      $query = $wpdb->prepare( "SELECT $id_column FROM $table WHERE meta_key = %s", $meta_key );
356      if ( !$delete_all )