未设置多维数组 [英] unset multidimensional array

问题描述

我有与此一时间地狱。我有我在一个会话存储我多维数组。

I am having a hell of a time with this. I have a multidimensional array that I am storing in a session.

$d1 = array(1,2,3,4);
$d2 = array(1,2,3,4,5,6);
$d3 = array(1,2,3,4,5,6,7,8);
$d4 = array(1,2,3,4,5);
$_SESSION['array1'] = array($d1,$d2,$d3,$d4);

我想要做的是去除会话ARRAY1的$ D2阵列

what I want to do is remove the $d2 array from the session array1

但是当我做这样的事情。

however when I do something like this

unset($_SESSION['array1'][1]); 

你会认为，$ _SESSION ['数组1']然后会=阵列（$ D1，D3 $，$ D4）;

you would think that $_SESSION['array1'] would then = array($d1,$d3,$d4);

但是，做什么是真正取消了整个会话变量。

however what that does is actually unset the whole session variable.

然后，如果我尝试像

foreach ($_SESSION['array1'] as $k => $v) {
echo "The Key is $k: The Value is $v";
}

不过，让我一个错误

however that gives me an error

有关的foreach提供了无效的参数（）

Invalid argument supplied for foreach()

这是我可以得出的唯一结论是，会话变量被完全取消设置，而不是只是特定的键被从阵列中删除。

The only conclusion that I can come to is that the session variable is being completely unset, not that just the specific key is being removed from the array.

在那里，我可以不设置包含一个数组，是一个会话变量的一部分内的特定值什么办法？

is there any way that i can unset a specific value contained within an array that is part of a session variable?

推荐答案

code你present按预期工作：

Code you present works as expected:

header("Content-Type: text/plain");
session_start();
$d1 = array(1,2,3,4);
$d2 = array(1,2,3,4,5,6);
$d3 = array(1,2,3,4,5,6,7,8);
$d4 = array(1,2,3,4,5);
$_SESSION['array1'] = array($d1,$d2,$d3,$d4);
unset($_SESSION['array1'][1]); 
print_R($_SESSION);

打印：

Array
(
    [array1] => Array
        (
            [0] => Array
                (
                    ...
                )

            [2] => Array
                (
                    ...
                )

            [3] => Array
                (
                    ...
                )

        )

)

因此​​，一些调试的想法：

So some debugging ideas:

1. 请不要使用 @session_start 。


2. 设置的error_reporting（E_ALL）


3. 在php.ini中配置错误报告


4. 检查cookie来看看PHPSESSID cookie是否在所有发送。

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