Recursive multidimensional array sort

recursive-sort.php

<?php

function recursive_sort($array,$child) {
  usort($array,function($a,$b){
    return $a['order'] - $b['order'];
  });
  foreach($array as $key => $value) {
    if(isset($value[$child]) && !empty($value[$child]) && is_array($value[$child])) {
      $array[$key][$child] = recursive_sort($value[$child],$child);
    }
  }
  return $array;
}