function qr_node($url, $sspass, $port, $method = 'aes-256-cfb')
{
$url = $method . ":{$sspass}@" . $url . ":{$port}";
$url = "ss://" . base64_encode($url);
$qrCode = new QrCode();
$qrCode->setText($url);
$qrCode->setSize(140);
$qrCode->setPadding(5);
$img = $qrCode->getDataUri();
return $img;
}