微信公众号开发（八）生成带参数二维码，以及将二维码下载至本地

/**
     * @name: 创建签到/签出/学生二维码
     * @desc: 描述
     * @author: camellia
     * @date: 20201201
* @email: guanchao_gc@qq.com
     * @param:  $open_id    string  1234@@@sign_in  1234@@@sign_out  1234@@@scan_add
     */
    public function createQrCode($open_id)
{
    // 获取 access_token 代码
        $access_token = $this->access_token();
        $ch = curl_init("https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=$access_token");
        $jsondata['expire_seconds'] = 86400;
        $jsondata['action_name'] = 'QR_STR_SCENE';
        $jsondata['action_info']['scene']['scene_str'] = $open_id;
        $jsondata['action_info']['scene']['scene_sign'] = 'sign_in';
        $data = json_encode($jsondata);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $res = curl_exec($ch);
        $tickarr = json_decode($res, true);
        $url = $this->createQrCodeByTick($tickarr['ticket']);
        return $url;
    }
    /**
     * @name: 创建签到/签出/学生二维码
     * @desc: 描述
     * @author: camellia
     * @date: 20210917
      * @email: guanchao_gc@qq.com
     * @param:  $ticket string  唯一字符串
     */
    public function createQrCodeByTick($ticket)
    {
        $url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=" . urlencode($ticket);
        $imageInfo = $this->downLoadWeiXinQrcode($url);
        $filename = 'qrcode_' . date("Y-m-d_H_i_s") . '.jpg';
        $filepath = './uploads/openQrcode/' . $filename;
        $local_file = fopen($filepath, 'w');
        if (false !== $local_file) {
            if (false !== fwrite($local_file, $imageInfo['body'])) {
                fclose($local_file);
            }
        }
        $url = getenv('APP_URL') . "/xxxxxx/xxx/xxxxxxxxx/public/ " . $filename;
        return $url;
    }
    /**
     * @name: 下载微信生成的二维码
     * @author: camellia
     * @date: 2021-12-08
* @email: guanchao_gc@qq.com
     * @param:  $url    string  二维码链接
     */
    public function downLoadWeiXinQrcode($url)
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_NOBODY, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $package = curl_exec($ch);
        $httpinfo = curl_getinfo($ch);
        curl_close($ch);
        return array_merge(
            array('body' => $package),
            array('header' => $httpinfo)
        );
    }