Session expiring before expiration period.

My sessions seem to be expiring before their expiration period. I've researched this quite a lot and am unable to resolve it. I thought may it was down to Asynchronous ajax calls (session race condition) so I extended the session class via MY_Sesssion.php to only regenerate the session if it's not an AJAX call. 

I've included both that function and my config below. I'm using CI version 3.1.7

PHP Code:

class MY_Session extends CI_Session {

    // --------------------------------------------------------------------

    /**
     *
     * Do not update an existing session on ajax or xajax calls
     *
     * @access    public
     * @return    void
     */
    public function sess_regenerate() {
        $CI = get_instance();

        if ( ! $CI->input->is_ajax_request())
        {
            parent::sess_regenerate();
        }
    }
} 


Config:

PHP Code:

$config['sess_expiration']        = 7200; //= 2 hours
$config['sess_driver']                  = 'database';
$config['sess_save_path']        = 'ci_session';
$config['sess_table_name']        = 'ci_session';
$config['sess_match_ip']        = FALSE;
$config['sess_time_to_update']          = 300; // 300 = 5 minutes
$config['sess_regenerate_destroy']      = TRUE; 


Does your server/PHP time have the same timezone as your MySQL Database?

Hi rhodium, thanks for the response.

MySQL
global time zone is UTC, session time zone is Europe/London.

PHP
date_default_timezone_set: Europe/London
date.timezone: Europe/London

So yes, I believe so.

You can follow this link https://stackoverflow.com/questions/5500...s-expiring this may help you.

You can follow this link https://stackoverflow.com/questions/5500...s-expiring this may help you.

Appreciate the help, but have already read that. This is essentially my last port of call as I've googled it to death.

Just following on from this. I believe this is my issue: https://github.com/bcit-ci/CodeIgniter/issues/154

Originally only on AJAX calls, but I can reproduce the issue by session sess_time_to_update to a low value, and opening several tabs which causes simultaneous requests.

Just following on from this. I believe this is my issue: https://github.com/bcit-ci/CodeIgniter/issues/154

Originally only on AJAX calls, but I can reproduce the issue by session sess_time_to_update to a low value, and opening several tabs which causes simultaneous requests.

Have you tried using session_write_close() as described in the session documentation "A note about concurrency"?

It's a singularly useful call inside ajax requests.