重新打开在PHP会话 [英] Reopening a session in PHP

问题描述

我怎样重新打开没有得到头已经发出警告，在PHP会话？

设置所有会话瓦尔我喜欢设置完成后，我关闭与 session_write_close会议（）。我这样做，因为只要会话是打开的，有可能是来自同一客户只有一个活动的连接。但我喜欢有多个并行的。

但是，如果我想在以后设置另一个会话变量，我需要重新打开的在session_start（）一次。这工作，但我已经送code到它打印客户端的头已经发出-warnings。为什么再次尝试设置Cookie？该Cookie已设置。我唯一​​需要的是获得再次写入服务器上的会话文件的访问。

好吧，我可以燮preSS他们。但有重开对话的一种方式，已关闭与session_write_close没有饼干头送重？ Cookie的头已经通过第一在session_start正确发送（）。所以，第二个只需要还给我访问写入存储在Web服务器上的会话文件。

 ＆LT; PHP
在session_start（）;
//设置所有会话瓦尔我喜欢设置
session_write_close（）; //＆下;  -  //为了允许由相同的用户并行请求，而这个脚本仍在运行// code，需要一些时间来执行
//它还打印输出，所以这点后，没有更多的饼干头@session_start（）; //＆LT;  - 工作，但我喜欢用它，而不燮pressing警告
$ _SESSION ['关键'] ='新的价值我想将';
session_write_close（）;
？＆GT;
 

解决方案

 在session_start（）;
...
session_write_close（）;
...的ini_set（'session.use_only_cookies'，FALSE）;
的ini_set（'session.use_cookies'，FALSE）;
的ini_set（'session.use_trans_sid指定'，FALSE）;
的ini_set（'session.cache_limiter'，NULL）;
在session_start（）; //第二次在session_start
 

这将prevent从PHP调用 php_session_send_cookie（）第二次。结果
看到它的工作。

虽然重组脚本似乎仍然是更好的选择 ...

How do I reopen a session in PHP without getting header already sent warnings?

After setting all the session vars I like to set, I close the session with session_write_close(). I do this, because as long as the session is open, there may be only one active connection from the same client. But I like to have multiple parallel ones.

However if I like to set another session variable at a later point, I need to reopen the session with session_start() once again. This works, but as I already send code to the client it prints "headers already sent"-warnings. Why is it trying to set the cookie again? The cookie is already set. Only thing I need is to gain access to writing the session files on the server again.

Well, I can suppress them. But is there a way of reopening a session, that has been closed with session_write_close without re-sending the Cookie-header? The Cookie-header is already sent correctly by the first session_start(). So the second one just needs to give me back access to writing to the session files stored on the web server.

<?php
session_start();
// setting all the session vars I like to set
session_write_close(); // <-- // To allow parallel requests by the same user, while this script is still running

// Code that takes some time to execute
// It also prints output, so no more cookie headers after this point

@session_start(); // <-- works, but I like to use it without suppressing warnings
$_SESSION['key'] = 'new value I like to store';
session_write_close();
?>

解决方案

session_start();
...
session_write_close();
...

ini_set('session.use_only_cookies', false);
ini_set('session.use_cookies', false);
ini_set('session.use_trans_sid', false);
ini_set('session.cache_limiter', null);
session_start(); // second session_start

This will prevent php from calling php_session_send_cookie() a second time.
See it working.

Though restructuring the scripts still seems to be the better option...

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