Domain::getTLD

static function getTLD(string $domainName): string
{
	$domainName = mb_strtolower(trim($domainName));
	$domainNameParts = explode('.', $domainName);
	$domainNameTld = $domainNameParts[count($domainNameParts) - 1];

	if ($domainNameParts[count($domainNameParts) - 2] == 'com')
	{
		$domainNameTld = 'com.' . $domainNameTld;
	}

	return $domainNameTld;
}