// 分享
    public function getApiTicketAction()
    {
        $url = Request::param('url');
        try {
            $jsapiTicket = $this->getJsapiTicket();
            $timestamp = time();
            $nonceStr = $this->createNonceStr(); // 构造一个随机数，用来生成签名的一部分
            $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url"; // 签名算法先按照ascII码排序
            $signature = sha1($string); // 对排序好的字符串加密
            $signPackage = array(
                'appId' => UserLogic::$wxAppid,
                'nonceStr' => $nonceStr,
                'timestamp' => $timestamp,
                'signature' => $signature
            );
            return ReturnCode::showReturnCode(ReturnCode::SUCCESS_CODE, '操作成功', $signPackage);
        } catch (\Exception $e) {
            Log::write('会员登录失败: ' . $e->getMessage(), 'error');
            return [
                'code' => ReturnCode::ERROR_CODE,
                'msg' => '失败' . $e->getMessage()
            ];
        }
    }
    
    // 构造一个随机数，用来生成签名的一部分
    public function createNonceStr($length = 16)
    { // 生成随机16个字符的字符串
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i find();
        if ($access_token_list['ticket_expires_time'] > time()) {
            $ticket = $access_token_list['ticket'];
            return $ticket;
        } else {
            if ($access_token_list['expires_time'] > time()) {
                $token = $access_token_list['access_token'];
            } else {
                $res = file_get_contents('https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $appid . '&secret=' . $secret);
                $res = json_decode($res, true);
                if (isset($res['errcode']) && ! empty($res['errcode'])) {
                    throw new \Exception($res['errmsg']);
                }
                $token = $res['access_token'];
            }
            $res2 = file_get_contents("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" . $token . "&type=jsapi");
            $res2 = json_decode($res, true);
            if (isset($res2['errcode']) && ! empty($res2['errcode'])) {
                throw new \Exception($res2['errmsg']);
            }
            $ticket = $res2['ticket'];
            // ticket 不能频繁的访问接口来获取，在每次获取后，我们把它保存到数据库中。
            if ($ticket) {
                $data = array(
                    'access_token' => $token,
                    'expires_time' => $time,
                    'expires_in' => '7000',
                    'ticket' => $ticket,
                    'ticket_expires_time' => $time
                );
                AccessTokenModel::where('id', 1)->update($data); // 把获得的token存储到数据库中
            }
            return $ticket;
        }
    }

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