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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
415 | * object type (comment, post, or user). |
416 | * |
417 | * @since 2.9.0 |
418 | * |
419 | * @param array $meta_ids An array of deleted metadata entry IDs. |
420 | * @param int $object_id Object ID. |
421 | * @param string $meta_key Meta key. |
422 | * @param mixed $meta_value Meta value. |
423 | */ |
424 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); |
425 |
|
426 | // Old-style action. |
427 | if ( 'post' == $meta_type ) { |
428 | /** |
429 | * Fires immediately after deleting metadata for a post. |
430 | * |
431 | * @since 2.9.0 |
432 | * |
433 | * @param array $meta_ids An array of deleted post metadata entry IDs. |
Line | Code |
731 | } |
732 |
|
733 | // Run the query, will return true if deleted, false otherwise |
734 | $result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) ); |
735 |
|
736 | // Clear the caches. |
737 | wp_cache_delete($object_id, $meta_type . '_meta'); |
738 |
|
739 | /** This action is documented in wp-includes/meta.php */ |
740 | do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); |
741 |
|
742 | // Old-style action. |
743 | if ( 'post' == $meta_type || 'comment' == $meta_type ) { |
744 | /** |
745 | * Fires immediately after deleting post or comment metadata of a specific type. |
746 | * |
747 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
748 | * object type (post or comment). |
749 | * |