I cannot remove user on logout

[eluser]Unknown[/eluser]
Hi

I am building a logout function, but every time the user is logging out the data is recreated for some reason. Even though i have tried everything to kill the data.

The following methods is what I have tried:

- [ session->unset_userdata('user_id'); ]
- [ session->sess_destroy(); ]
- Delete the entry in the database.
- Deleted the cookie which hold user information.
- Destroyed all cookie and session information.

Right now my code look like this:

Code:

public function logout()
{
  // Load needed classes
  $ci =& get_instance();
  
  $ci->session->unset_userdata('user_id');
  
  $user_id = $ci->session->userdata('user_id');
  if(!empty($user_id))
  {
   return false;
  }
  
  $ci->login_model->del_user_session($ci->session->userdata('session_id'));
  
  delete_cookie('checkout_session');
  setcookie('checkout_session', '', time()-42000, '/');
  
  return true;
}