会话变量不可用

Question

我正在用print_r（$ _ SESSION）在它显示下面的数组的索引页中打印会话。

Array 
(
    [name] => hhh 
) 

index.php 

    <?php 
    session_start(); 
    $_SESSION['name']='hhh'; 

我想在任何时候取消设置这个变量。因此，我创建在同一目录中一个新的PHP文件包含以下内容

<?php 

    session_start(); 
    echo "before destroying the session"; 
    print_r($_SESSION); 
    unset($_SESSION['name']);//remove the name session variable which is available in my index page. 
    session_destroy(); //destroy the session 
    echo "after destroying the session"; 
    print_r($_SESSION); 

但每当我运行上面的代码将打印以下内容：

before destroying the sessionArray () after destroying the sessionArray () 

为什么我会是可用在指数页面无法在上面的脚本页面中访问？

在此先感谢

Answer 1

我不知道你的目标是什么，这是你的代码做什么：

# You start your session 
session_start(); 

# Echo a string 
echo "before destroying the session"; 

# Print the $_SESSION array, comes out empty because you havn't put anything in the session 
print_r($_SESSION); 

# You unset the 'name' key in the $_SESSION array, which wasn't even there in the first place 
unset($_SESSION['name']); 

# You get rid of the session 
session_destroy(); 

# Echo a string 
echo "after destroying the session"; 

# You print $_SESSION variable again, which is going to be empty, because you just destroyed the session. 
print_r($_SESSION); 

我的观点解释你的代码是什么你真的想做什么？

如果您希望在多个页面间使用$ _SESSION，只需在页面之间不要使用session_destroy（），只有在用户“注销”后才能将其销毁，然后在所有页面上使用session_start（）。

Answer 2

您需要在索引文件中启动会话session_start()。

的index.php

session_start(); 
$_SESSION['name'] = "test"; 

test.php的

include 'index.php'; 

    echo "before destroying the session"; 
    print_r($_SESSION); 
    unset($_SESSION['name']);//remove the name session variable which is available in my index page. 
    session_destroy(); //destroy the session 
    echo "after destroying the session"; 
    print_r($_SESSION); 

输出

before destroying the sessionArray ([name] => test) after destroying the sessionArray ()