session_cache_limiter（）无法正常工作？

Trying to limit a session to one minute, but somehow the session is still available after 1 minute. Am I using it wrong? I read that when I set a Value the session will expire in X Minutes, but sadly they don't.

Here's the code:

<?php
   session_cache_limiter(1);
   session_start();

   if( isset( $_SESSION['counter'] ) ) {
      $_SESSION['counter'] += 1;
   }else {
      $_SESSION['counter'] = 1;
   }

   $msg = "You have visited this page ".  $_SESSION['counter'];
   $msg .= " times in this session.";
?>