WordPress at a glance
action is not described

update_postmeta action-hook . WP 2.9.0

Fires immediately before updating a post's metadata.

Usage

add_action( 'update_postmeta', 'action_function_name_6567', 10, 4 );
function action_function_name_6567( $meta_id, $object_id, $meta_key, $meta_value ){
	// action...
}
$meta_id(int)
ID of metadata entry to update.
$object_id(int)
Post ID.
$meta_key(string)
Meta key.
$meta_value(mixed)
Meta value. This will be a PHP-serialized string representation of the value if the value is an array, an object, or itself a PHP-serialized string.

Where the hook is called

update_metadata()
update_postmeta
update_metadata_by_mid()
update_postmeta
wp-includes/meta.php 264
do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
wp-includes/meta.php 736
do_action( 'update_postmeta', $meta_id, $object_id, $meta_key, $meta_value );

Where the hook is used (in WP core)

Использование не найдено.