$height = isset($_GET["height"]) ? $_GET["height"] : null;
$text = isset($_GET["text"]) ? $_GET["text"] : null;
$wifi_type = isset($_GET["wifi_type"]) ? $_GET["wifi_type"] : null;
$ssid = isset($_GET["ssid"]) ? $_GET["ssid"] : null;
$password = isset($_GET["password"]) ? $_GET["password"] : null;
$size = isset($_GET["size"]) ? $_GET["size"] : null;
$qr = new BarcodeQR();
switch ($type) {
case 'url':
$qr->url($url);
break;
case 'contact':
$qr->contact($name, $address, $phone, $email);
break;
case 'email':
$qr->email($email, $subject, $message);
break;
case 'geo':
$qr->geo($lat, $lon, $height);
break;
case 'phone':
$qr->phone($phone);
break;
case 'sms':
$qr->sms($phone, $message);
break;
case 'text':
$qr->text($text);
break;
case 'wifi':
$qr->wifi($wifi_type, $ssid, $password);
