Something wrong with this code?

array(‘allow’, // allow admin user to perform ‘admin’ and ‘delete’ actions

			'actions'=>array('admin','delete','create','update','view','index'),


			'users'=> array('$user->isAdmin'),


		),

I wanted that in an array of admins, they can do these functions in my user table… I also tried ‘expressions’ instead of users but it will not give me the correct result.