Question

I am trying to implement the logout procedure for my website.
When the user clicks the sign out button I redirect him to the following home controller script.

http : // mydomain/php/ci/index.php/index/?logout=set

And in my home controller index function I check if logout=set then destroy all sessions.

    echo @$_GET['logout'];
    exit();
    if(@$_GET['logout'] == "set")
    {
        unset($_SESSION['userid']);
        @$_SESSION = array();
        @session_unset();
        @session_destroy();
    }

But when I reach here nothing gets printed because the logout param is not passing.
I see the following url when i get here on clicking the sign out button.

http://localhost/php/ci/home/

Why is this happening?

Answer 1

You can get all the get data with CodeIgniter like this:

var_dump($this->input->get());

However, don’t use the index method to log users out, but make a method for it, like i.e. this:

class Users extends CI_Controller() {
    public function index() {
        // Index stuff here        
    }

    public function logout() {
        // Your check if a user is logged in, instead of the dirty @
        if(isSet($_SESSION['userid'])) {
            unset($_SESSION['userid']);
        }

        redirect();
    }
}

Then in your view make a link like this:

site_url("users/logout");

You will want to use the CodeIgniter session handler for this, but this is just a quick solution for your problem. I can advice you to read the CodeIgniter manual. As your “solution” for logging out is quite dirty and does not fit the MVC principle