YII框架递归

Controller:

    public function actionWorkadd()
    {
        $sql&＃61;"select * from work";
        $data&＃61;Yii::$app->db->createCommand($sql)->queryAll();
        //print_r($data);die;
        $option&＃61;nolimit($data,0);   //调用递归方法
        //print_r($option);die;
        return $this->renderPartial(&＃39;workadd&＃39;,[&＃39;res&＃39;&＃61;>$option]);
    }

function nolimit($data,$p_id&＃61;0,$level&＃61;0){
        //加static防止覆盖上一次的
        static $arr&＃61;array();
        foreach($data as $v){
            if($v[&＃39;p_id&＃39;]&＃61;&＃61;$p_id){
                $v[&＃39;level&＃39;]&＃61;$level;
                $arr[]&＃61;$v;
                $option&＃61;nolimit($data,$v[&＃39;w_ids&＃39;],$level&＃43;1);
            }
        }
        //返回数据
        return $arr;
    }

view&＃xff1a;

                  请选择...
                  $v):?>
                  ">
               
 

样式&＃xff1a;

数据库样式&＃xff1a;