可能重复：
如何在30分钟后使PHP会话过期？
这是我的注销脚本，如果页面处于非活动状态10分钟，我想注销用户，并使用header发送到index.php。
<?php
//initialize the session
if (!isset($_SESSION)) {
session_start();
}
// ** Logout the current user. **
$logoutAction = $_SERVER['PHP_SELF']."?doLogout=true";
if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")){
$logoutAction .="&". htmlentities($_SERVER['QUERY_STRING']);
$msg = "You have been logout successfully.";
}
if ((isset($_GET['doLogout'])) &&($_GET['doLogout']=="true")){
//to fully log out a visitor we need to clear the session varialbles
$_SESSION['MM_Username'] = NULL;
$_SESSION['MM_UserGroup'] = NULL;
$_SESSION['PrevUrl'] = NULL;
unset($_SESSION['MM_Username']);
unset($_SESSION['MM_UserGroup']);
unset($_SESSION['PrevUrl']);
$logoutGoTo = "index.php";
if ($logoutGoTo) {
header("Location: $logoutGoTo");
exit;
}
}
?>
这是通过设置会话超时来完成的。例如：
$idle = xxx;
$session_life = time() - $_SESSION['timeout_logout'];
if($session_life > $idle)
{
session_destroy(); header("Location: index.php");
}
S_SESSION['timeout_logout']=time();