Ajax请求不续订会话？

Question

On my website, when user is logged in, there is an AJAX request going on every ~20seconds, the requested PHP is working with sesssion (starts with session_start).

I thought that having the website opened + the "infinite" ajax requesting should keep the logged-in user logged-in.

However I got an echo from one of my users, that he gets logged-out after a longer while - how is this possible? Isn't ajax request respectively the requested PHP renewing the Session?

What might cause these logg-outs?

Thanks in advance.

Answer 1

Try putting something like this in your header

<?php
ini_set('session.gc_maxlifetime', 60 * 60); //ini_set('session.gc_maxlifetime', Mulpitplyer*Seconds);
session_start();
?>

Sessions can also drop off if the user has an "unstable" internet conection