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Source View: delete_{$meta_type}_meta

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: apply_filters( "hook_name", "what_to_filter" ).

Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.

Source View

This hook occurs 2 times in this file.

Line Code
373       * object type (comment, post, or user).
374       *
375       * @since 3.1.0
376       *
377       * @param array  $meta_ids   An array of metadata entry IDs to delete.
378       * @param int    $object_id  Object ID.
379       * @param string $meta_key   Meta key.
380       * @param mixed  $meta_value Meta value.
381       */
382      do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
383
384      // Old-style action.
385      if ( 'post' == $meta_type ) {
386           /**
387            * Fires immediately before deleting metadata for a post.
388            *
389            * @since 2.9.0
390            *
391            * @param array $meta_ids An array of post metadata entry IDs to delete.
 
Line Code
707      // object and id columns
708      $column = sanitize_key($meta_type . '_id');
709      $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
710
711      // Fetch the meta and go on if it's found.
712      if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
713           $object_id = $meta->{$column};
714
715           /** This action is documented in wp-includes/meta.php */
716           do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
717
718           // Old-style action.
719           if ( 'post' == $meta_type || 'comment' == $meta_type ) {
720                /**
721                 * Fires immediately before deleting post or comment metadata of a specific type.
722                 *
723                 * The dynamic portion of the hook, `$meta_type`, refers to the meta
724                 * object type (post or comment).
725                 *