Detailed explanation of steps to implement PHP array recursive sorting

This time I will bring you a detailed explanation of the steps to implement PHP array recursive sorting. What are the precautions for implementing PHP array recursive sorting? The following is a practical case, let's take a look.

/**
 * 递归根据特定key对数组排序
 * @param $data
 * @param string $orderKey
 * @param string $sonKey
 * @param int $orderBy
 * @return mixed
 */
function recursion_orderby($data, $orderKey = 'order', $sonKey = 'children', $orderBy = SORT_ASC)
{
  $func = function ($value) use ($sonKey, $orderKey, $orderBy) {
    if (isset($value[$sonKey]) && is_array($value[$sonKey])) {
      $value[$sonKey] = recursion_orderby($value[$sonKey], $orderKey, $sonKey, $orderBy);
    }
    return $value;
  };
  return array_orderby(array_map($func, $data), $orderKey, $orderBy);
}
$a = [
  [
    'order' => 0,
  ],
  [
    'order' => -1,
    'children' => [
      [
        'order' => 0,
      ],
      [
        'order' => -2,
        'children' => [
          ['order' => 0],
          ['order' => -1],
          ['order' => 1],
        ],
      ],
    ],
  ],
  [
    'order' => 2,
  ],
];
var_dump(recursion_orderby($a));
/**
 * 输出：
array(3) {
 [0] =>
 array(2) {
  'order' =>
  int(-1)
  'children' =>
  array(2) {
   [0] =>
   array(2) {
    'order' =>
    int(-2)
    'children' =>
    array(3) {
     [0] =>
     array(1) {
      'order' =>
      int(-1)
     }
     [1] =>
     array(1) {
      'order' =>
      int(0)
     }
     [2] =>
     array(1) {
      'order' =>
      int(1)
     }
    }
   }
   [1] =>
   array(1) {
    'order' =>
    int(0)
   }
  }
 }
 [1] =>
 array(1) {
  'order' =>
  int(0)
 }
 [2] =>
 array(1) {
  'order' =>
  int(2)
 }
}
*/

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the steps to connect the database with ThinkPHP framework PDO

Detailed explanation of the steps to install the yaf extension in PHP7.1

The above is the detailed content of Detailed explanation of steps to implement PHP array recursive sorting. For more information, please follow other related articles on the PHP Chinese website!