PHP 如何创建基于相似键值对的多维数组

Question

可以说我有这个数组：

$array_1 = array(
     array(
        'model' => 'iPhone 12',
        'grade' => 'A',
        'price' => '100'
     ),

     array(
        'model' => 'iPhone 12',
        'grade' => 'A',
        'price' => '95'
     ),

     array(
        'model' => 'iPhone 13 Pro',
        'grade' => 'B',
        'price' => '85'
     ),

     array(
        'model' => 'iPhone 13 Pro',
        'grade' => 'C',
        'price' => '75'
     )

     array(
        'model' => 'iPhone 13 Pro Max',
        'grade' => 'C',
        'price' => '75'
     )

  );

我怎样才能将该数组更改为这样的东西 - 如果model相同，它创建的是自己的子数组：

$array_2 = array(

    array(

        array(
            'model' => 'iPhone 12',
            'grade' => 'A',
            'price' => '100'
        ),
        
        array(
            'model' => 'iPhone 12',
            'grade' => 'A',
            'price' => '95'
        )
    ),

    array(

        array(
            'model' => 'iPhone 13 Pro',
            'grade' => 'B',
            'price' => '85'
        ),

        array(
            'model' => 'iPhone 13 Pro',
            'grade' => 'C',
            'price' => '75'
        )

    ),

    array(
       'model' => 'iPhone 13 Pro Max',
       'grade' => 'C',
       'price' => '75'
    )
 );

本质上是制作一个 3 维数组？ 我对这些不是很熟悉，所以如果有人可以帮助我，那就太棒了。