/app/app_controller.php

<?php



class AppController extends Controller {





     function check_users() {  

    // get user data from session  

    $user = $this->Session->read('User');  

  

    // if empty  

    if(empty($user)) {  

        // set a flash message  

        $this->Session->setFlash('ERROR: You must be logged to access the admin area.', 'flash_bad');  

        // redirect user  

         $this->redirect('index');

    }  

} 

}