检查会话是否是PHP中的新内容 [英] Check whether a session is new in PHP

问题描述

我有一个网站，每个用户会话需要执行一次特定的后端功能。因此，我希望能够确定任何给定的页面视图是否是给定会话中的第一个。

I have a website that needs to perform a certain backend function once per user session. I therefore want to be able to determine whether any given page view is the first within a given session.

根据PHP文档：

session_start（）根据通过GET或POST请求传递的
a会话标识符创建会话或恢复当前会话或传递通过
cookie。

session_start() creates a session or resumes the current one based on a session identifier passed via a GET or POST request, or passed via a cookie.

那么有什么办法可以知道会话是在创建还是恢复？

So is there any way to know whether the session is being created or resumed?

或者这是我必须根据我在服务器上维护的列表检查当前会话ID的情况，以检查它是否已经注册过？如果是这样，这是否需要写入数据库，或者是否有一种不那么麻烦的内存方式？

Or is this a situation where I have to check the current session ID against a list I maintain on the server, to check if it's been registered before? If so, does this necessitate writing to a database, or is there a less cumbersome, in-memory way of doing this?

推荐答案

<?php
session_start();
if(empty($_SESSION['exists'])){
    //handle completely new session here
}
$_SESSION['exists'] = true;
.... //continue on with normal request

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