User Authentication - Placement of code?

[eluser]RyanH[/eluser]
I tried your method, but a bit modified and I got this error:

Fatal error: Can't use method return value in write context in /home/.sera/thirdnet/thirdwatchnet.com/erbooks/system/application/controllers/home.php on line 12

This is the code that I have:

Code:

class Home extends Controller{
    
    function Home()
    {
        parent::Controller();
    }
    
    function index()
    {
        if(empty($this->session->userdata('session_id')))
        {
            $this->load->view('login_view');
            exit();
        }
    }
}

What did I do wrong?