微信网页授权报code been used, hints: [ req_id: XYv1Ha07042046 ]

    public function index()
    {
        $code = input(‘get.code‘);
        $tool = new Wxtool();

        if (empty($code))
        {
             $url = ‘http://www.layton.top/wx/Receive‘;
             $tool -> getCode($url, 2);
        }else
        {
            $tool -> getWebAccessToken($code);
        }
    }

     public function getCode($url,$type=1)
     {
         $redirect_uri = urlencode($url);
         $scope = null;

         if($type == 1)
         {
             $scope = ‘snsapi_base‘;
         }else{
             $scope = ‘snsapi_userinfo‘;
         }

         $code = ‘https://open.weixin.qq.com/connect/oauth2/authorize?appid=‘ . APPID .‘&redirect_uri=‘ . $redirect_uri . ‘&response_type=code&scope=‘ . $scope . ‘&state=STATE#wechat_redirect‘;
         header("location:" . $code);
     }


     public function getWebAccessToken($code)
     {
         $url = ‘https://api.weixin.qq.com/sns/oauth2/access_token?appid=‘ . APPID . ‘&secret=‘ . APPSECRET . ‘&code=‘ . $code . ‘&grant_type=authorization_code‘;
         $data = $this -> http_curl($url, ‘get‘);
         dump($data);
     }