如何实现返回嵌套数组的自定义重组函数？

Question

我的数据来自一个数据库，该数据库提取所有子类别和相关信息：

$data = array(
    array(
        'destination_name' => 'Ohio Resort',
        'destination_slug' => 'ohio',
        'subcategory_name' => 'Bird Hunting',
        'subcategory_slug' => 'bird-hunting',
        'category_name' => 'Hunting',
        'category_slug' => 'hunting',
    ),
    array(
        'destination_name' => 'Ohio Resort',
        'destination_slug' => 'ohio',
        'subcategory_name' => 'Bear Hunting',
        'subcategory_slug' => 'bear-hunting',
        'category_name' => 'Hunting',
        'category_slug' => 'hunting',
    ),
    array(
        'destination_name' => 'Maryland Resort',
        'destination_slug' => 'maryland',
        'subcategory_name' => 'Bird Hunting',
        'subcategory_slug' => 'bird-hunting',
        'category_name' => 'Hunting',
        'category_slug' => 'hunting',
    ),
    array(
        'destination_name' => 'Cali Resort',
        'destination_slug' => 'california',
        'subcategory_name' => 'Sledding',
        'subcategory_slug' => 'sledding',
        'category_name' => 'Winter Sports',
        'category_slug' => 'winter-sports',
    ),
);

我正在用它生成 xml，但我需要根据我的特定需求对其进行重新排序。假设我指定 functionCall( $data, array('destination', 'category', 'subcategory') );

我希望它以这种形式返回：

Array(
   [california] => array(
      [_name] => 'California',
      [winter-sports] => array(
         '_name' => 'Winter Sports',
         [0] => array(
            subcategory_name => Sledding,
            subcategory_slug => sledding
         )
      )
   ),
   [maryland] => array(      
      [_name] => 'Maryland',
      [hunting] => array(
         '_name' => 'Hunting',
         [0] => array(
            subcategory_name => Bird Hunting,
            subcategory_slug => bird hunting
         )
      )
   ),
   [ohio] => array(
      [_name] => 'Ohio',
      [hunting] => array(
         '_name' => 'Hunting',
         [0] => array(
            subcategory_name => Bird Hunting,
            subcategory_slug => bird-hunting
         ),
         [1] => array(
            subcategory_name => Bear Hunting,
            subcategory_slug => bear-hunting
         )
      )
   ),

);

如果我指定 functionCall( $data, array('category', 'subcategory') ); 我希望它返回：

Array(
          [winter-sports] => array(
             '_name' => 'Winter Sports',
             [0] => array(
                subcategory_name => Sledding,
                subcategory_slug => sledding
             )
          ),

          [hunting] => array(
             '_name' => 'Hunting',
             [0] => array(
                subcategory_name => Bird Hunting,
                subcategory_slug => bird hunting
             ),
             [1] => array(
                subcategory_name => Bear Hunting,
                subcategory_slug => bear-hunting
             )
          )
);

有人可以提供一些关于创建将数据作为第一个参数、将级别嵌套作为第二个参数的函数的指示吗参数并以正确的格式返回它？

到目前为止，我正在手动进行重组：

$data = array();
foreach( $categories as $res ) {
    $destinationSlug = $res['destination_slug'];
    $destinationName = $res['destination_name'];
    $categorySlug = $res['category_slug'];
    $categoryName = $res['category_name'];
    if ( !in_array( $destinationSlug, array_keys( $data ) ) ) {
    $data[ $destinationSlug ] = array();
    $data[ $destinationSlug ]['_name'] = $destinationName;
    }
    if ( !in_array( $categorySlug, array_keys( $data[ $destinationSlug ] ) ) ) {
    $data[ $destinationSlug ][ $categorySlug ] = array();
    $data[ $destinationSlug ][ $categorySlug ]['_name'] = $categoryName;
    }
    $data[ $destinationSlug ][ $categorySlug ][] = array(
    'subcategory_slug' => $res['subcategory_slug'],
    'subcategory_name' => $res['subcategory_name'],
    );
}
return $data;

随机注释：

• 数据将始终采用这种格式。总会有 _slug 和 _name 对。
• 我需要能够按字母顺序对结果进行排序

Answer 1

您可以使用 uasort，它允许使用用户定义的函数对数组进行排序。但我建议让你自己的函数来做这件事。