如何使用PHP将数组的第一个键与数组的其余键分开？

Question

我有一个下面的数组，它是我从Rubrics表中得到的，我正在使用一个jquery扩展，它给了我下面的数组：

Array
(
    [1] => Array
        (
            [0] => Identifies Dilemma
            [1] => Has a vague idea of what the dilemma is and is uncertain what must be decided
            [2] => Identifies the dilemma, including pertinent facts, and ascertains what must be decided
            [3] => Describes the dilemma in detail having gathered pertinent facts. Ascertains exactly what must be decided
        )

    [2] => Array
        (
            [0] => Considers Stakeholders
            [1] => Is unsure as to who should be involved in the decision-making process
            [2] => Determines who should be involved in the decision-making process and accurately identifies all the stakeholders
            [3] => Determines who should be involved in the decision-making process and thoroughly reflects on the viewpoints of the stakeholders
        )

)

我尝试获取的输出是:-

[
'Identifies Dilemma' => [
            [1] => Has a vague idea of what the dilemma is and is uncertain what must be decided
            [2] => Identifies the dilemma, including pertinent facts, and ascertains what must be decided
            [3] => Describes the dilemma in detail having gathered pertinent facts. Ascertains exactly what must be decided
       
                        ]
],
[
'Considers Stakeholders' => [
         [1] => Is unsure as to who should be involved in the decision-making process
            [2] => Determines who should be involved in the decision-making process and accurately identifies all the stakeholders
            [3] => Determines who should be involved in the decision-making process and thoroughly reflects on the viewpoints of the stakeholders
      
       
                        ]
]

这是我到目前为止已经尝试过的，但如果一些php函数可以帮助我，我不想在很多情况下使用它。

    $rubics = json_decode($model->rubric_json);
            $originalPoints = json_decode($model->points_json)[0];
            $rubicsCols = json_decode($model->rubric_json)[0];
            unset($rubics[0]);
            if (!empty($rubics)) {
                foreach ($rubics as $key => $data) {
                    $rows[] =  $data[0];
                }
            }
            
            echo "<pre>";
            print_r($rubics);exit;

Answer 1

$arr = [
   ['a','b','c'],
   ['a1','b1','c1']
];

$newArray = [];

foreach ($arr as $key => $data) {
    $newKey = $data[0];
    unset($data[0]);
    $newArray[$newKey] = $data;
}

print_r($newArray);

输出：

Array
(
    [a] => Array
    (
        [1] => b
        [2] => c
    )

    [a1] => Array
    (
        [1] => b1
        [2] => c1
    )

)