更改多维数组的键

Question

我有以下数组作为db的响应。我正试图根据我的要求将此数据库响应转换为多维数组。

       Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [_id] => C10359
                    [AE] => Array
                        (
                            [0] => 89785
                            [1] => 89786
                            [2] => 89857
                            [3] => 89859
                        )
                )
            [1] => Array
                (
                    [_id] => C10428
                    [AE] => Array
                        (
                            [0] => 50191
                            [1] => 50203
                            [2] => 50230
                            [3] => 50244
                        )
                )
        )
    [1] => Array
        (
            [0] => Array
                (
                    [_id] => C10350
                    [AE] => Array
                        (
                            [0] => 89785
                            [1] => 89786
                            [2] => 89857
                            [3] => 89859
                        )
                )
            [1] => Array
                (
                    [_id] => C10430
                    [AE] => Array
                        (
                            [0] => 50191
                            [1] => 50203
                            [2] => 50230
                            [3] => 50244
                        )
                )
        )
)

现在我需要按照以下方式转换上面的数组。

    Array
(
    [0] => Array
        (
            [C10359] => Array
                (
                    [0] => 89785
                    [1] => 89786
                    [2] => 89857
                    [3] => 89859
                )
            [C10428] => Array
                (
                    [0] => 50191
                    [1] => 50203
                    [2] => 50230
                    [3] => 50244
                )   
        )
    [1] => Array
        (
            [C10350] => Array
                (
                    [0] => 89785
                    [1] => 89786
                    [2] => 89857
                    [3] => 89859
                )
            [C10430] => Array
                (
                    [0] => 50191
                    [1] => 50203
                    [2] => 50230
                    [3] => 50244
                )   
        )
)

以下是我尝试的方法

array_map(function($arr) {
       return $arr[0] ; 
    },$panel_result);

但它不工作。

请建议我如何转换所需的格式。

Answer 1

这应该能奏效:

$arr = array(
    array(
        array(
            '_id' => 'C10359',
            'AE' => array
            (
                89785,
                89786,
                89857,
                89859,
            ),
        ),
        array(
            '_id' => 'C10428',
            'AE' => array
            (
                50191,
                50203,
                50230,
                50244,
            ),
        ),
    ),
);
$output = array();
foreach ($arr as $levelK => $level) {
    if(!isset($output[$levelK])){
        $output[$levelK] = array();
    }
    foreach ($level as $subLevel) {
        $id = $subLevel['_id'];
        if (!isset($output[$levelK][$id])) {
            $output[$levelK][$id] = array();
        }
        foreach ($subLevel['AE'] as $val) {
            $output[$levelK][$id][] = $val;
        }
    }
}

Answer 2

使用array_column()并传递第三个参数作为索引键

$reqArray = array();
foreach ($yourArray as $key => $innerArray) {
  $reqArray[] = array_column($innerArray, 'AE', '_id');
}

或

使用array map()

$reqArray = array_map(function($a){
 return array_column($a, 'AE', '_id');
},$arr);