//响应json    /*$data = [        'errCode'=>0,        'errMsg' =>'success',        'data'   => 'yxh',    ];    return response()->json($data);*///重定向    //return redirect('Hello');    //return redirect('Hello')->with('message','yxh');    //return redirect()->action('UserController@Hello')->with('message','yxh');    //return redirect()->route('Hello')->with('message','yxh');//返回上一个页面    //return redirect()->back();