分享一个不错的递归方式，效率更高

/**
  * @Notes (备注)        : 部门递归所有下级
  * @Author (作者)       : Seven
  * @Date (开发时间)      : 2021/9/14 15:58
  * @Interface (方法名称) : departmentTree
  * @param $data array
  * @return array
  */
public function departmentTree($data)
 {
     $items = array();
     foreach ($data as $v) {
         $items[$v['id']] = $v;
     }
     $tree = array();
     foreach ($items as $k => $item) {
         if (isset($items[$item['parent_id']])) {
             $items[$item['parent_id']]['level'][] = &$items[$k];
         } else {
             $tree[] = &$items[$k];
         }
     }
     return $tree;
 }