added_(meta_type)_meta action-hook . WP 2.9.0

Fires immediately after meta of a specific type is added.

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

Usage

add_action( 'added_(meta_type)_meta', 'action_function_name_4172', 10, 4 );
function action_function_name_4172( $mid, $object_id, $meta_key, $_meta_value ){
	// action...
}

$mid(int)

The meta ID after successful update.

$object_id(int)

Object ID.

$meta_key(string)

Meta key.

$_meta_value(mixed)

Meta value.

Where the hook is called

do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value );

Where the hook is used (in WP core)

add_action( 'added_post_meta', 'wp_cache_set_posts_last_changed' );

add_action( 'added_term_meta', 'wp_cache_set_terms_last_changed' );

add_action( 'added_comment_meta', 'wp_cache_set_comments_last_changed' );

add_action( 'added_blog_meta', 'wp_cache_set_sites_last_changed' );