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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 |
---|---|
448 | * object type (comment, post, term, or user). |
449 | * |
450 | * @since 2.9.0 |
451 | * |
452 | * @param array $meta_ids An array of deleted metadata entry IDs. |
453 | * @param int $object_id Object ID. |
454 | * @param string $meta_key Meta key. |
455 | * @param mixed $_meta_value Meta value. |
456 | */ |
457 | do_action( "deleted_{$meta_type}_meta", $meta_ids, $object_id, $meta_key, $_meta_value ); |
458 |
|
459 | // Old-style action. |
460 | if ( 'post' == $meta_type ) { |
461 | /** |
462 | * Fires immediately after deleting metadata for a post. |
463 | * |
464 | * @since 2.9.0 |
465 | * |
466 | * @param array $meta_ids An array of deleted post metadata entry IDs. |
Line | Code |
839 | } |
840 |
|
841 | // Run the query, will return true if deleted, false otherwise |
842 | $result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) ); |
843 |
|
844 | // Clear the caches. |
845 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
846 |
|
847 | /** This action is documented in wp-includes/meta.php */ |
848 | do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value ); |
849 |
|
850 | // Old-style action. |
851 | if ( 'post' == $meta_type || 'comment' == $meta_type ) { |
852 | /** |
853 | * Fires immediately after deleting post or comment metadata of a specific type. |
854 | * |
855 | * The dynamic portion of the hook, `$meta_type`, refers to the meta |
856 | * object type (post or comment). |
857 | * |