|wp-includes/functions.php: _deprecated_hook()|| |
Marks a deprecated action or filter hook as deprecated and throws a notice.
|wp-includes/plugin.php: has_action()|| |
Check if any action has been registered for a hook.
|wp-includes/plugin.php: do_action_ref_array()|| |
Calls the callback functions that have been added to an action hook, specifying arguments in an array.