PHP生成二维码

    /**
     * 生成原始的二维码(生成图片文件)
     * @param int $level
     * @param int $size
     */
    public function qrcode($level=8,$size=8){
        Vendor('phpqrcode.phpqrcode');
        $errorCorrectionLevel =intval($level) ;//容错级别
        $matrixPointSize = intval($size);//生成图片大小
        //生成二维码图片
        $object = new QRcode();
        //二维码内容
        $url = "http://".$_SERVER['SERVER_NAME']."/index.php/Home/Explain/explain?t_id=".$_GET['t_id']."&u_id=".$_GET['u_id'];
        $object->png($url, false, $errorCorrectionLevel, $matrixPointSize, 2);
    }