PHP：使用foreach从多维数组中删除元素(按键)

发布时间：2020-12-13 22:19:23 所属栏目：PHP教程来源：网络整理

导读：我得到了多维数组.从每个子数组,我想删除/取消设置索引1的值.我的数组$data. Array( [3463] = Array ( [0] = 1 [1] = 2014 [context] = 'aaa' ) [3563] = Array ( [0] = 12 [1] = 2014 [context] = 'aaa' ) [2421] = Array ( [0] = 5 [1] = 2014 [context] =

我得到了多维数组.从每个子数组,我想删除/取消设置索引1的值.我的数组$data.

Array
(
    [3463] => Array
        (
            [0] => 1
            [1] => 2014
            [context] => 'aaa'
        )

    [3563] => Array
        (
            [0] => 12
            [1] => 2014
            [context] => 'aaa'
        )       

    [2421] => Array
        (
            [0] => 5
            [1] => 2014
            [context] => 'zzz'
        )               
)

我想从子数组中删除索引为’1’的每个元素.期望的输出是：

Array
(
    [3463] => Array
        (
            [0] => 1
            [context] => 'aaa'
        )

    [3563] => Array
        (
            [0] => 12
            [context] => 'aaa'
        )       

    [2421] => Array
        (
            [0] => 5
            [context] => 'zzz'
        )               
)

为什么这不起作用？

foreach ($data as $subArr) {
   foreach ($subArr as $key => $value) {
       if ($key == '1') {
        unset($subArr[$key]);
       }

   }
}

我很抱歉,如果这个问题对你们来说是微不足道的话.

解决方法

简单的方法！？
你可以用一个foreach做到这一点！

foreach ($data as $key => $subArr) {
    unset($subArr['1']);
    $data[$key] = $subArr;  
}

（编辑：李大同）

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