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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
344       * object type (comment, post, or user).
345       *
346       * @since 3.1.0
347       *
348       * @param array  $meta_ids   An array of metadata entry IDs to delete.
349       * @param int    $object_id  Object ID.
350       * @param string $meta_key   Meta key.
351       * @param mixed  $meta_value Meta value.
352       */
353      do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
354
355      // Old-style action.
356      if ( 'post' == $meta_type ) {
357           /**
358            * Fires immediately before deleting metadata for a post.
359            *
360            * @since 2.9.0
361            *
362            * @param array $meta_ids An array of post metadata entry IDs to delete.
 
Line Code
663      // object and id columns
664      $column = sanitize_key($meta_type . '_id');
665      $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
666
667      // Fetch the meta and go on if it's found.
668      if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
669           $object_id = $meta->{$column};
670
671           /** This action is documented in wp-includes/meta.php */
672           do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
673
674           // Old-style action.
675           if ( 'post' == $meta_type || 'comment' == $meta_type ) {
676                /**
677                 * Fires immediately before deleting post or comment metadata of a specific type.
678                 *
679                 * The dynamic portion of the hook, $meta_type, refers to the meta
680                 * object type (post or comment).
681                 *