php中array_multisort对多维数组排序的方法

function sort_array($array, $keyid, $order='asc', $type='number') {
 if(is_array($array)) {
  foreach($array as $val) {
   $order_arr[] = $val[$keyid];
  }
  $order = ($order == 'asc') ? SORT_ASC: SORT_DESC;
  $type = ($type == 'number') ? SORT_NUMERIC: SORT_STRING;
  array_multisort($order_arr, $order, $type, $array);
 }
}