Problem with Codeigniter

Codeiginter session Library is internally using COOKIE, so you may get cache issue mostly in IE browsers, means cookie is store in client browser, when client received response header then updated session value will show on client end.
You may resolve issue from following things

1. You can use other session library that can work with PHP session (ref: https://github.com/bcit-ci/CodeIgniter/w...ve-session)
   
2. If you want to use CI native session library, then you should mind following things,  When session is created / updated, you should also remove cache from response header.
    
   
   PHP Code:

    header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0"); 

   
   
   

Passionate PHP Programmer & Codeigniter Developer :- Always happy to help you!