load-categories.php action-hook . WP 1.0

Usage

add_action( 'load-categories.php', 'action_function_name_301' );
function action_function_name_301(){
	// action...
}

Where the hook is called

do_action( 'load-categories.php' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

Where the hook is used (in WP core)