public static function downloadQrCode($url, $alias, $size = 300)
{
$urlDecoded = base64_decode($url);
if ($size > 300) {
$errorCorrection = 'high';
} elseif ($size > 100) {
$errorCorrection = 'medium';
} else {
$errorCorrection = 'low';
}
if (empty($alias)) {
$alias = $urlDecoded;
$slashPos = strrpos($urlDecoded, '.de/');
if ($slashPos !== false) {
$alias = substr($urlDecoded, $slashPos + strlen('.de/'));
} else {
$slashPos = strrpos($urlDecoded, '/');
if ($slashPos !== false) {
$alias = substr($urlDecoded, $slashPos + 1);
}
}
}
$qrCode = new Endroid\QrCode\QrCode();
$qrCode->setText($urlDecoded)->setSize($size)->setPadding(10)->setErrorCorrection($errorCorrection)->setForegroundColor(array('r' => 0, 'g' => 0, 'b' => 0, 'a' => 0))->setBackgroundColor(array('r' => 255, 'g' => 255, 'b' => 255, 'a' => 0));
$image = $qrCode->get();
$filename = preg_replace('#[^A-Za-z0-9._-]#', '', $alias) . '_' . $size . '.png';
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . $filename);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . strlen($image));
print $image;
exit;
}
$ec = Endroid\QrCode\QrCode::LEVEL_MEDIUM;
break;
case 'L':
default:
$ec = Endroid\QrCode\QrCode::LEVEL_LOW;
break;
}
$qrCode->setErrorCorrection($ec);
$qrCode->setModuleSize((int) $configs['qrcode_mps'] - 1);
$qrCode->setPadding($configs['qrcode_margin'] * $qrCode->getModuleSize());
$qrCode->setBackgroundColor(normalizeColor($configs['qrcode_bgcolor']));
$qrCode->setForegroundColor(normalizeColor($configs['qrcode_fgcolor']));
//$qrCode->setText("Life is too short to be generating QR codes");
//$qrCode->setSize(300);
try {
$qrData = $qrCode->get('png');
} catch (\Exception $e) {
$xoopsPreload->triggerEvent('core.exception', $e);
$qrData = '';
}
$mimetype = \Xoops\Core\MimeTypes::findType('png');
$expires = 60 * 60 * 24 * 15;
// seconds, minutes, hours, days
header("Cache-Control: public, max-age=" . $expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $expires) . ' GMT');
//header('Last-Modified: ' . gmdate('D, d M Y H:i:s T', $mtime));
header('Content-type: ' . $mimetype);
echo $qrData;
exit;
/**
* normalizeColor
