Question

我有一个多维数组和一个数组，该数组包含该多维数组中某个元素的键。如何根据带键的数组取消设置该元素。我正在寻找无论数组尺寸如何都可以工作的代码。

以下是示例：

<?php
$array = array(
    1 => array('name' => 'mike','age' => 23),
    2 => array('name' => 'nick','age' => 18),
);

$keys   = array(2,'name');

//
//Here code to unset that element
//

/*
//This is how the new array should be:
$array = array(
    1 => array('name' => 'mike','age' => 23),
    2 => array('age' => 18),
);
*/
?>

编辑：上面的代码是为了清晰。到目前为止，我可以使用unset（）添加我尝试的内容，但它没有任何用处，并且会使问题不那么明确。我正在寻求正确方向的提示，而不是完全正常工作的代码。

Answer 1

我找到了一个解决方案：

<?php

function unsetByKeys($keys,&$array,$path = array()){

    $diff   = count($keys)-count($path);
    if($diff > 1){
        $path[] = $keys[count($path)];
        unsetByKeys($keys,$array,$path);
    }else{
        $lastKey    = $keys[count($path)];

        $subArray   = &$array;
        foreach($path AS $p){
            $subArray   = &$subArray[$p];
        }
        unset($subArray[$lastKey]);
    }
}

$array = array(
    1 => array('name' => 'mike','age' => 23),
    2 => array('name' => 'nick','age' => 18),
);

$keys   = array(2,'name');

unsetByKeys($keys,$array);

var_dump($array);
?>

Answer 2

代码：（http://www.tehplayground.com/#9Oup7h6gh）

// example code

$array = array(
1 => array('name' => 'mike','age' => 23),
2 => array('name' => 'nick','age' => 18),
);

$keys   = array(2,'name');

unset($array[($keys[0])][($keys[1])]);

print_r($array);

/*
//This is how the new array should be:
$array = array(
    1 => array('name' => 'mike','age' => 23),
    2 => array('age' => 18),
);
*/

输出：

Array
(
[1] => Array
    (
        [name] => mike
        [age] => 23
    )

[2] => Array
    (
        [age] => 18
    )

)

php删除基于键数组的元素

2 个答案: