PHP返回json封装

直接上代码

/**
     * @param string $code
     * @param string $msg
     * @param array $data
     * 返回json
     */
    protected function return_json($code='',$msg='',$data=array()){
        $arr = array(
            'code' => $code,
            'msg' =>$msg
        );
        $arr['data'] = $data;
        json($arr,200, ['Access-Control-Allow-Origin'=> '*','Access-Control-Allow-Headers'=>'content-type,token,x-requested-with','Access-Control-Expose-Headers'=>'*','Access-Control-Allow-Methods'=>"GET,POST,PUT,DELETE,PATCH,OPTIONS"])->send();
        exit;
    }