title: Session expire time in Laravel
body: <p>The session expire time is 30 minutes(1800 seconds) in my project. Im using Laravel 5.2 and I save session in redis. </p>
  
  <p>However, I am confused by this:</p>
  
  <p>If I write data to the active session, while its TTL is 100 seconds, the sessions new TTL is now 1800 seconds again.</p>
  
  <p>So could someone tell me why this happens? I guess Laravel will reset session expire time after writting data to the session, but I am not sure about that now.</p>