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

after going through all the troubles and searching in various places i have finally found a proper solution to this question.the problem arrived because the browser was showing the cached pages.it was not the session that was creating the problem and it was working properly. here is the solution: in the home controller adding a function to clear the cache and calling it in the constructor function does the trick :) here is the home controller with the solution:

<?php
class Home extends CI_Controller
{
    function __construct()
    {
        parent:: __construct();
        $this->is_logged_in();
        $this->clear_cache();
    }
    function is_logged_in() 
    {

        if (!$this->session->userdata('is_logged_in'))
        {
            redirect('/admin/admin');
        }
    }
    function clear_cache()
    {
        $this->output->set_header("Cache-Control: no-store, no-cache, must-revalidate, no-transform, max-age=0, post-check=0, pre-check=0");
        $this->output->set_header("Pragma: no-cache");
    }
    function admin_home()
    {
        $data['main_content'] = 'home_view';
        $this->load->view('admin/home_view');
    }
}

now thanks goes to this link " logout feature in code igniter ",here is where i have found the solution and it works perfectly :)

Answer 2

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