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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
376       * object type (comment, post, or user).
377       *
378       * @since 3.1.0
379       *
380       * @param array  $meta_ids   An array of metadata entry IDs to delete.
381       * @param int    $object_id  Object ID.
382       * @param string $meta_key   Meta key.
383       * @param mixed  $meta_value Meta value.
384       */
385      do_action( "delete_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value );
386
387      // Old-style action.
388      if ( 'post' == $meta_type ) {
389           /**
390            * Fires immediately before deleting metadata for a post.
391            *
392            * @since 2.9.0
393            *
394            * @param array $meta_ids An array of post metadata entry IDs to delete.
 
Line Code
716      // object and id columns
717      $column = sanitize_key($meta_type . '_id');
718      $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
719
720      // Fetch the meta and go on if it's found.
721      if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
722           $object_id = $meta->{$column};
723
724           /** This action is documented in wp-includes/meta.php */
725           do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
726
727           // Old-style action.
728           if ( 'post' == $meta_type || 'comment' == $meta_type ) {
729                /**
730                 * Fires immediately before deleting post or comment metadata of a specific type.
731                 *
732                 * The dynamic portion of the hook, `$meta_type`, refers to the meta
733                 * object type (post or comment).
734                 *