UrlItem::isUrlValid

static function isUrlValid(string $url): bool
{
	return !(
		!($parsedUrl = parse_url($url))
		|| empty($parsedUrl['host'])
		|| strpos($parsedUrl['host'], '.') === false // domain without dots
		|| preg_match("/[s]+/", $parsedUrl['host']) // spaces in the host
		|| (!empty($parsedUrl['port']) && !is_numeric($parsedUrl['port'])) // non digit port
	);
}