use ion auth authentication for codeigniter in another controller

Question

I am trying to build a web application with codeigniter. I have installed Ion Auth as my authentication model.

The default Auth.php controller authenticates the user and

Answer 1

First autoload the ion_auth library. If u simply want to check if the user is logged-in, just check it in every controller's constructor u load

public function __construct() {  
    parent::__construct();

    if (!$this->ion_auth->logged_in()) {
       // redirect to login view
    } 
}

If u happen to have multiple groups , u can create a new controller inside application/core/MY_controller.This controller will check whether user is logged in.You can extend this base controller to create new controller.A very good explanation on this is given by David john.Check this link .