t1gor/Robots.txt-Parser-Class

<?php declare(strict_types=1);

namespace t1gor\RobotsTxtParser\Parser;

class HostName {
    public static function isValid(string $hostName): bool {
        $filtered    = filter_var($hostName, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME);
        $isIpAddress = false !== $filtered && static::isIpAddress($filtered);

        return false !== $filtered && !$isIpAddress;
    }

    public static function isIpAddress(string $hostName): bool {
        return $hostName === filter_var($hostName, FILTER_VALIDATE_IP);
    }
}