php+qrcode类+生成二维码方法

　　//生成二维码
    public function qrcode()
    {
        $data = input();
        if(!$data['param']){
          return json(['code ' => 2, 'data' => '', 'msg' => '您有必填参数未携带']);exit;
        }
        if ($data['imgtype'] == 1) { //图片类型

            $imgpath = "./web/logo.png";
        } elseif ($data['imgtype'] == 2) {

            $imgpath = "./web/icon-close.png";
        } else {

            $imgpath = "./web/logo_cart.png";
        }

        if ($data['param']) {
            $param = json_decode($data['param'], true);
            $crl = '?';
            foreach ($param as $key => $value) {
                $crl .= $key . '=' . $value . '&';
            }
        }
        $url        = config('wapsite') . trim($crl, '&');
        $name       = uniqid() . '.png';
        $upload_dir = ENV::get('root_path') .  'public/static/qrcode/';

        if (!is_dir($upload_dir)) {
            mkdir($upload_dir, 0755, true);
        }
        $filedir = $upload_dir . $name;
        $qrCode = new QrCode($url);
        if ($data['type'] == 1) { //logo二维码
            $qrCode->setLogoPath($imgpath); //设置logo图片路径
            $qrCode->setLogoWidth(60);  //设置logo图片宽度
            $qrCode->setLogoHeight(60);  //设置logo图片高度
            $qrCode->writeFile($filedir);
        } else { //普通文字二维码
            $qrCode->writeFile($filedir);
        }
        $qrsrc = request()->domain() . '/static/qrcode/' . $name;
        if ($qrsrc) {
            return json(['code ' => 1, 'data' => $qrsrc, 'msg' => '获取数据成功']);
        } else {
            return json(['code ' => 2, 'data' => '', 'msg' => '获取数据失败']);
        }
    }