小程序封装获取太阳码

      $scene,
            'page'      =>      $page,
            'width'     =>      280
        ];

        $wxUtil = new WxUtil();
        $access_token = $wxUtil->get_access_token();

        if (!$access_token){
            return false;
        }

        $request_url = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token='.$access_token;
        $result = Http::doPostJson($request_url,$request_data);
        $decode_result = json_decode($result,true);
        if ($decode_result['errcode']){
            return false;
        }

        // 存入cdn
        $uploadUtil = new UploadUtil();
        $cdn_result = $uploadUtil->uploadCdn($result,'suncode');
        if ($cdn_result['errno'] == 0){
            return $cdn_result['save_name'];
        } else {
            return false;
        }
    }


    /**
     * 获取access_token
     * 小程序的appid,secret
     * 或者
     * 公众号的appid,secret 公众号获取access_token需要配置ip白名单
     */ 
    public function get_access_token($app_id = '', $app_secret = '')
    {
        $app_id = $app_id ?: C('APP_ID');
        $app_secret = $app_secret ?: C('APP_SECRET');
        // 查询缓存中是否存在
        $key = "access_token_" . $app_id;
        $ttl = $this->red->ttl($key);
        if ($ttl == -2) { // 不存在
            // step1 获取
            $request_url = "https://api.weixin.qq.com/cgi-bin/token?";
            $request_url .= "grant_type=client_credential&appid=" . $app_id . "&secret=" . $app_secret;
            $data = json_decode(Http::doGet($request_url, 5), true);

            // step2 存储
            $this->red->setex($key, $data['expires_in'] - 1000, $data['access_token']);
            return $data['access_token'];
        } else {
            return $this->red->get($key);
        }
    }
}