title: php session is not destroying after i close site's tab on my browser?
body: <p>If i have my website's tab open on google chrome , along with other tabs are open, session is not destroying if i close my website's tab. To destroy the session i need to close the whole browser, including all tabs. Is ther anyway i can log users out when they close just the website's tab only and not the whole browser?
  I'm using codeIgniter. and config setting is as below</p>
  
  <pre><code>$config['sess_cookie_name']     = 'ci_session';
  $config['sess_expiration']      = 0;
  $config['sess_expire_on_close'] = TRUE;
  $config['sess_encrypt_cookie']  = FALSE;
  $config['sess_use_database']    = FALSE;
  $config['sess_table_name']      = 'ci_sessions';
  $config['sess_match_ip']        = FALSE;
  $config['sess_match_useragent'] = TRUE;
  $config['sess_time_to_update']  = 300;
  </code></pre>