public static function isPrivateIP($ip)
{
if (!_IpAddresses::isIPAddress($ip)) {
return false;
}
$slash8 = _IpAddresses::checkIpToNetwork($ip, '255.0.0.0');
if ($slash8 == '10.0.0.0' || $slash8 == '127.0.0.0') {
return true;
}
$slash12 = _IpAddresses::checkIpToNetwork($ip, '255.240.0.0');
if ($slash12 == '172.16.0.0') {
return true;
}
$slash16 = _IpAddresses::checkIpToNetwork($ip, '255.255.0.0');
if ($slash16 == '169.254.0.0' || $slash16 == '192.168.0.0') {
return true;
}
return false;
}
public static function lookupHostDNS($host)
{
if (_IpAddresses::isIPAddress($host)) {
return _IpAddresses::getHostByIp($host);
} else {
$host = escapeshellarg($host);
exec('host -t a -W 2 ' . $host, $output, $return);
if ($return !== 0) {
return '';
} else {
$output = implode($output);
$ips = _IpAddresses::getAllIPsFromString($output, true);
$ir = "";
foreach ($ips as $ip) {
$ir .= "{$ip},";
}
return trim($ir, ',');
}
/*
if(strripos($host,'not found')!==false) return false;
if(strripos($host,'SERVFAIL')!==false) return false;
$phost = trim(end(explode(' ', $host)));
if(strripos($phost,'reached')!==false) return false;
return $phost;
*/
}
}