PHP 如何创建多个会话? [英] PHP How can I create multiple sessions?

问题描述

我希望能够在 php 中的会话之间来回切换.这是我当前的代码:

I want to be able to switch back and forth between sessions in php. Here is my current code:

<?php

session_name("session1");
session_start();
$_SESSION["name"] = "1";
echo "<pre>", print_r($_SESSION, 1), "</pre>";
session_write_close();

session_name("session2");
session_start();
$_SESSION["name"] = "2";
echo "<pre>", print_r($_SESSION, 1), "</pre>";
session_write_close();

session_name("session1");
session_start();
echo "<pre>", print_r($_SESSION, 1), "</pre>";

我想要它输出

Array
(
    [name] => 1
)
Array
(
    [name] => 2
)
Array
(
    [name] => 1
)

但它正在输出

Array
(
    [name] => 1
)
Array
(
    [name] => 2
)
Array
(
    [name] => 2
)

是否可以在这样的会话之间切换?我不需要同时运行两个会话，但我确实需要能够在它们之间切换.当我运行这段代码时，我得到了两个具有相同值的 cookie:session1 和 session2.

Is it possible to switch between sessions like that? I don't need two sessions running at the same time, but I do need to be able to switch between them. When I run this code, I get two cookies: session1 and session2 with the same value.

感谢您的帮助！

推荐答案

你需要使用的是 session_id() 而不是 session_name()

What you need to use is session_id() instead of session_name()

<?php

session_id("session1");
session_start();
echo session_id();
$_SESSION["name"] = "1";
echo "<pre>", print_r($_SESSION, 1), "</pre>";
session_write_close();

session_id("session2");
echo session_id();
session_start();
$_SESSION["name"] = "2";
echo "<pre>", print_r($_SESSION, 1), "</pre>";
session_write_close();

session_id("session1");
echo session_id();
session_start();
echo "<pre>", print_r($_SESSION, 1), "</pre>";
session_write_close();

session_id("session2");
echo session_id();
session_start();
echo "<pre>", print_r($_SESSION, 1), "</pre>";

这将打印:

session1

Array
(
    [name] => 1
)

session2

Array
(
    [name] => 2
)

session1

Array
(
    [name] => 1
)

session2

Array
(
    [name] => 2
)

session_id 是会话的标识符，有助于区分会话.session_name 只是当前会话的命名别名

session_id is an identifier for a session, which helps in distinguishing sessions. session_name is only a named alias for the current session

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