按路径取消多维数组中的元素 [英] Unset element in multi-dimensional array by path

问题描述

我正在尝试删除多维数组中的元素。

I'm trying to remove an element in a multidimensional array.

需要删除的元素由类似 globals.connects.setting1 。这意味着我打算修改这样的数组：

The element which is needs to be removed is given by a string like globals.connects.setting1. This means I'm intend to modify an array like this:

// Old Array
$old = array(
    "globals" => array(
        "connects" => array(
            "setting1" => "some value",
            "setting2" => "some other value",
            "logging" => array()),
    "someOtherKey" => 1
));

// After modification
$new = array(
    "globals" => array(
        "connects" => array(
            "setting2" => "some other value",
            "logging" => array()),
    "someOtherKey" => 1
));

不幸的是，我既不知道给定字符串的深度，也不知道数组的确切结构。我正在寻找类似 unsetElement（$ path，$ array）的函数，如果返回，该函数将返回数组 $ new 给出数组 $ old 和 globals.connects.setting1 作为参数。

Unfortunately I do not know either the "depth" of the given string nor the exact structure of the array. I'm looking for a function like unsetElement($path, $array) which returns the array $new, if the array $old and globals.connects.setting1 is given as argument.

出于安全原因，我想避免使用 eval（）函数。

I'd like to avoid the use of the eval() function due to security reasons.

推荐答案

  $testArr = [
        "globals" => [
            "connects" => [
                'setting1' => [
                    'test' => 'testCon1',
                ],
                'setting2' => [
                    'abc' => 'testCon2',
                ],
            ],
        ],
        'someOtherKey' => [],
    ];

$pathToUnset = "globals.connects.setting2";

    function unsetByPath(&$array, $path) {
        $path = explode('.', $path);
        $temp = & $array;

        foreach($path as $key) {
            if(isset($temp[$key])){
                if(!($key == end($path))) $temp = &$temp[$key];
            } else {
               return false; //invalid path
            }
        }
        unset($temp[end($path)]);
    }

    unsetByPath($testArr, $pathToUnset);

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