PHP - 使用foreach取消设置$ _SESSION变量

Is it possible to unset $_SESSION variables using a foreach cycle? This is an example.

是否可以使用foreach循环取消设置$ _SESSION变量?这是一个例子。

<?php
session_start();
$_SESSION['one'] = 'one';
$_SESSION['two'] = 'two';
$_SESSION['three'] = 'three';
print_r($_SESSION);
foreach($_SESSION as $value) {
    unset($value);
}
session_destroy();
print_r($_SESSION);
?>

I think that this script should work but it's not working for me. It gives me this output, without unsetting the variables :

我认为这个脚本应该可以工作,但它对我不起作用。它给了我这个输出,而没有取消设置变量:

Array ( [one] => one [two] => two [three] => three )
Array ( [one] => one [two] => two [three] => three )

数组([1] => 1 [2] => 2 [3] => 3)数组([1] => 1 [2] => 2 [3] => 3)

Maybe it's a problem related to superglobal arrays. I can anyway unset the variables using their key :

也许这是与超全球阵列有关的问题。无论如何,我可以使用他们的密钥取消设置变量:

unset($_SESSION['one']);

3 个解决方案

#1

You must get the key and unset $_SESSION[$key] or pass your variable by reference (not sure if you can unset a reference).

您必须获取密钥并取消设置$ _SESSION [$ key]或通过引用传递您的变量(不确定是否可以取消设置引用)。

foreach($_SESSION as $key => $value) {
    unset($_SESSION[$key]);
}

foreach($_SESSION as &$value) {
    unset($value);
}

#2

unset it with,

取消它,

unset($_SESSION);

#3

Pass the variable by reference :

通过引用传递变量:

foreach($_SESSION as &$value) {
    // edit $value
}

#1