deleted_(meta_type)meta action-hook . WP 3.4.0

Fires immediately after deleting post or comment metadata of a specific type.

The dynamic portion of the hook, $meta_type, refers to the meta object type (post or comment).

Usage

add_action( 'deleted_(meta_type)meta', 'action_function_name_1993' );
function action_function_name_1993( $meta_ids ){
	// action...
}

$meta_ids(int)

Deleted metadata entry ID.

Where the hook is called

do_action( "deleted_{$meta_type}meta", $meta_id );

Where the hook is used (in WP core)

add_action( 'deleted_post_meta', 'wp_cache_set_posts_last_changed' );

add_action( 'deleted_term_meta', 'wp_cache_set_terms_last_changed' );

add_action( 'deleted_comment_meta', 'wp_cache_set_comments_last_changed' );