/**
* This helper function can be used to get a valid domain.tld from an url and return it.
*
* @param string $url
*
* @return mixed
*/
function getDomain($url)
{
if (!empty($url)) {
// Sanitize URL first by removing unwanted chars
$url = preg_replace("/[\n\r]/", '', $url);
// Sanitize URL accourding to RFC1738 (perhaps use RFC3986?)
$entities = [' '];
$replacements = ['%20'];
$url = str_replace($entities, $replacements, $url);
// Check weither the URL is actually valid
if (!filter_var($url, FILTER_VALIDATE_URL) === true) {
return false;
}
$pslManager = new Pdp\PublicSuffixListManager();
$urlParser = new Pdp\Parser($pslManager->getList());
$urlData = $urlParser->parseUrl($url)->toArray();
if ($urlParser->isSuffixValid($urlData['registerableDomain']) === false) {
// Not a valid domain.
return false;
} else {
// Return valid domain
return $urlData['registerableDomain'];
}
} else {
return false;
}
}
