检查 php 会话到期前剩余的时间

Question

我需要为我的网站构建一个 php 会话到期警报/保持登录提示。我看过几十个例子，但很困惑，所以回到基础。

有没有办法显示默认到期时间的倒计时？

更新 1

到目前为止 - 为了了解情况 - 我有：

echo '<p>This is the $_SESSION[\'expiretime\']: ' . $_SESSION['expiretime'] . '</p>';           
echo '<p>This is the time(): ' . time() . '</p>';           
$timeleft =  time() - $_SESSION['expiretime'];          
echo '<p>This is the time() MINUS the $_SESSION[\'expiretime\'] : ' . $timeleft . '</p>';

我不确定参数 $_SESSION['expiretime'] 是什么，但我在一个线程中找到它并且看起来很有趣。除了自 1970 年以来的秒数，我不确定所有这些告诉我什么，但可能对后续计算有用。

Answer 1

你必须做类似

的事情

//Start our session.
session_start();

//Expire the session if user is inactive for 30
//minutes or more.
$expireAfter = 30;

//Check to see if our "last action" session
//variable has been set.
if(isset($_SESSION['last_action'])){

  //Figure out how many seconds have passed
  //since the user was last active.
  $secondsInactive = time() - $_SESSION['last_action'];

  //Convert our minutes into seconds.
  $expireAfterSeconds = $expireAfter * 60;     
  //Check to see if they have been inactive for too long.
  if($secondsInactive >= $expireAfterSeconds){
    //User has been inactive for too long.
    //Kill their session.
    session_unset();
    session_destroy();
  } else {
    echo("Expire in:");
    echo($expireAfterSeconds - $secondsInactive); 
  } 
}
$_SESSION['last_action'] = time();

检查 php 会话到期前剩余的时间

Check time left before php session expires

php

session-variables

更新 1