强制请求中的会话 ID
有谁知道为什么这行不通？
if(isset($_POST['PHPSESSID'])) {
session_id($_POST['PHPSESSID']);
session_start();
var_dump($_SESSION);
}
var_dump($_SESSION);总是空的！应该是装满东西的吧！是否有任何设置可以防止强制使用会话 ID？自动启动未启用。
Does anyone have any thoughts about why this wouldn't work?
if(isset($_POST['PHPSESSID'])) {
session_id($_POST['PHPSESSID']);
session_start();
var_dump($_SESSION);
}
The var_dump($_SESSION); is always empty! It should be loaded with stuff! Are there any settings that prevent forcing session IDs? Auto start is not enabled.
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评论（3）
您发布的代码是正确的。但是，由于以下几个原因之一，您可能在会话中看不到变量：
$_POST['PHPSESSID']未设置$_POST['PHPSESSID']包含非- 数字字符$_POST['PHPSESSID']不是指session_id之前调用填充的会话 IDsession_start()如果这些都不适用，我不知道问题是什么，但你为什么不尝试使用
session_name()（它是为你想要做的事情而设计的）而不是session_id？The code you posted is correct. However, you may not be seeing variables in your session for one of several reasons:
$_POST['PHPSESSID']is not set$_POST['PHPSESSID']contains non-numeric characters$_POST['PHPSESSID']does not refer to a populated session IDsession_start()was called before your call tosession_idIf none of these apply, I don't know what the issue is, but why don't you try using
session_name()(which was designed for what you're trying to do) instead ofsession_id?您的
$_POST['PHPSESSID']一定是错误的：检查其值。如果更改了会话处理程序，则必须仅使用该特定会话处理程序允许的字符。
资源：
Your
$_POST['PHPSESSID']must be wrong :Check its value. If you changed the session handler, you must use only the allowed characters for this specific session handler.
Resources :
会话保存路径存在问题。它设置不正确，所以我可以猜测 PHP 依赖浏览器 cookie 来创建会话，而不是会话保存路径中的文件。
There was an issue with the session save path. It wasn't set up right, so I can guess that PHP was relying on browser cookies to create the session instead of the files in the session save path.