codeigniter sess_destroy() not working properly,what m i doing wrong?

Question

I am a newbie in codeigniter. I am using an an login form to login as an admin. When the admin logs in with the correct user name and password s/he is directed to the home p

Answer 1

If you logout then although the session is destroyed, the session userdata remains for the duration of the current CI page build.

As a precautionary measure you should do:

function log_out()
{
    $this->session->sess_destroy();
    // null the session (just in case):
    $this->session->set_userdata(array('user_name' => '', 'is_logged_in' => ''));

    redirect('/admin/admin');
}

See: http://codeigniter.com/forums/viewthread/110993/P130/#662369