告诉用户会话已结束

Question

好的，所以下面有一些代码会在一段时间后将用户退出网站。但是我需要帮助来回显一下login.php页面为什么你要注销，以便人们知道会话已经结束。有人可以帮我解决这个问题。先感谢您。

if (isset($_SESSION['LAST_ACTIVITY']) && (time() - $_SESSION['LAST_ACTIVITY'] > 1800 )) {
    // last request was more than 30 minutes ago
    session_unset();     // unset $_SESSION variable for the run-time 
    session_destroy();   // destroy session data in storage
}
$_SESSION['LAST_ACTIVITY'] = time(); // update last activity time stamp


if (!isset($_SESSION['CREATED'])) {
    $_SESSION['CREATED'] = time();
} else if (time() - $_SESSION['CREATED'] > 1800 ) {
    // session started more than 30 minutes ago
    session_regenerate_id(true);    // change session ID for the current session an invalidate old session ID
    $_SESSION['CREATED'] = time();  // update creation time
}