yii设置返回数据为JSON格式

<?php 
namespace appcontrollers;

use Yii;
use yiifiltersAccessControl;
use yiiwebController;
use yiifiltersVerbFilter;
use appmodelsLoginForm;
use appmodelsContactForm;
use  yiiwebResponse;


/**
* 获取店铺列表
*/
class ShopController extends Controller
{
    
    public function actionShop()
    {

        $data = (new yiidbQuery())
                /*->select(['id','email'])*/
                ->from('wd_b_shop')
                ->limit(10)
                ->all();
         Yii::$app->response->format=Response::FORMAT_JSON;//在返回值之前加一句,设置返回格式是JSON
         return ['code'=>false,'message'=>$data];
    }
}
 ?>

完美解决