PHP whois lookup Class

This is a standalone php class to find whois information of domain or IP.
Class features

  • Automatically lookup for secondary whois server.
  • In-built IP and domain validator.
  • Automatically remove http:// and www. from start of domain
  • No dependencies

How it works?

Each TLD (Top Level Domain) has different whois server (eg: .com and .net whois server is whois.verisign-grs.com) which listen at port no. 43. In this class we have list of whois servers according to their TLD. First extract TLD from domain and find its whois server. Then connect to whois server on port 43 using fsockopen() and write the domain name using fputs(). And finally read the response using fgets().

Whois Class Code

<?php
class Whois{
private $WHOIS_SERVERS = array(
"com"               =>  array("whois.verisign-grs.com","whois.crsnic.net"),
"net"               =>  array("whois.verisign-grs.com","whois.crsnic.net"),
"org"               =>  array("whois.pir.org","whois.publicinterestregistry.net"),
"info"              =>  array("whois.afilias.info","whois.afilias.net"),
"biz"               =>  array("whois.neulevel.biz"),
"us"                =>  array("whois.nic.us"),
"uk"                =>  array("whois.nic.uk"),
"ca"                =>  array("whois.cira.ca"),
"tel"               =>  array("whois.nic.tel"),
"ie"                =>  array("whois.iedr.ie","whois.domainregistry.ie"),
"it"                =>  array("whois.nic.it"),
"li"                =>  array("whois.nic.li"),
"no"                =>  array("whois.norid.no"),
"cc"                =>  array("whois.nic.cc"),
"eu"                =>  array("whois.eu"),
"nu"                =>  array("whois.nic.nu"),
"au"                =>  array("whois.aunic.net","whois.ausregistry.net.au"),
"de"                =>  array("whois.denic.de"),
"ws"                =>  array("whois.worldsite.ws","whois.nic.ws","www.nic.ws"),
"sc"                =>  array("whois2.afilias-grs.net"),
"mobi"              =>  array("whois.dotmobiregistry.net"),
"pro"               =>  array("whois.registrypro.pro","whois.registry.pro"),
"edu"               =>  array("whois.educause.net","whois.crsnic.net"),
"tv"                =>  array("whois.nic.tv","tvwhois.verisign-grs.com"),
"travel"            =>  array("whois.nic.travel"),
"name"              =>  array("whois.nic.name"),
"in"                =>  array("whois.inregistry.net","whois.registry.in"),
"me"                =>  array("whois.nic.me","whois.meregistry.net"),
"at"                =>  array("whois.nic.at"),
"be"                =>  array("whois.dns.be"),
"cn"                =>  array("whois.cnnic.cn","whois.cnnic.net.cn"),
"asia"              =>  array("whois.nic.asia"),
"ru"                =>  array("whois.ripn.ru","whois.ripn.net"),
"ro"                =>  array("whois.rotld.ro"),
"aero"              =>  array("whois.aero"),
"fr"                =>  array("whois.nic.fr"),
"se"                =>  array("whois.iis.se","whois.nic-se.se","whois.nic.se"),
"nl"                =>  array("whois.sidn.nl","whois.domain-registry.nl"),
"nz"                =>  array("whois.srs.net.nz","whois.domainz.net.nz"),
"mx"                =>  array("whois.nic.mx"),
"tw"                =>  array("whois.apnic.net","whois.twnic.net.tw"),
"ch"                =>  array("whois.nic.ch"),
"hk"                =>  array("whois.hknic.net.hk"),
"ac"                =>  array("whois.nic.ac"),
"ae"                =>  array("whois.nic.ae"),
"af"                =>  array("whois.nic.af"),
"ag"                =>  array("whois.nic.ag"),
"al"                =>  array("whois.ripe.net"),
"am"                =>  array("whois.amnic.net"),
"as"                =>  array("whois.nic.as"),
"az"                =>  array("whois.ripe.net"),
"ba"                =>  array("whois.ripe.net"),
"bg"                =>  array("whois.register.bg"),
"bi"                =>  array("whois.nic.bi"),
"bj"                =>  array("www.nic.bj"),
"br"                =>  array("whois.nic.br"),
"bt"                =>  array("whois.netnames.net"),
"by"                =>  array("whois.ripe.net"),
"bz"                =>  array("whois.belizenic.bz"),
"cd"                =>  array("whois.nic.cd"),
"ck"                =>  array("whois.nic.ck"),
"cl"                =>  array("nic.cl"),
"coop"              =>  array("whois.nic.coop"),
"cx"                =>  array("whois.nic.cx"),
"cy"                =>  array("whois.ripe.net"),
"cz"                =>  array("whois.nic.cz"),
"dk"                =>  array("whois.dk-hostmaster.dk"),
"dm"                =>  array("whois.nic.cx"),
"dz"                =>  array("whois.ripe.net"),
"ee"                =>  array("whois.eenet.ee"),
"eg"                =>  array("whois.ripe.net"),
"es"                =>  array("whois.ripe.net"),
"fi"                =>  array("whois.ficora.fi"),
"fo"                =>  array("whois.ripe.net"),
"gb"                =>  array("whois.ripe.net"),
"ge"                =>  array("whois.ripe.net"),
"gl"                =>  array("whois.ripe.net"),
"gm"                =>  array("whois.ripe.net"),
"gov"               =>  array("whois.nic.gov"),
"gr"                =>  array("whois.ripe.net"),
"gs"                =>  array("whois.adamsnames.tc"),
"hm"                =>  array("whois.registry.hm"),
"hn"                =>  array("whois2.afilias-grs.net"),
"hr"                =>  array("whois.ripe.net"),
"hu"                =>  array("whois.ripe.net"),
"il"                =>  array("whois.isoc.org.il"),
"int"               =>  array("whois.isi.edu"),
"iq"                =>  array("vrx.net"),
"ir"                =>  array("whois.nic.ir"),
"is"                =>  array("whois.isnic.is"),
"je"                =>  array("whois.je"),
"jp"                =>  array("whois.jprs.jp"),
"kg"                =>  array("whois.domain.kg"),
"kr"                =>  array("whois.nic.or.kr"),
"la"                =>  array("whois2.afilias-grs.net"),
"lt"                =>  array("whois.domreg.lt"),
"lu"                =>  array("whois.restena.lu"),
"lv"                =>  array("whois.nic.lv"),
"ly"                =>  array("whois.lydomains.com"),
"ma"                =>  array("whois.iam.net.ma"),
"mc"                =>  array("whois.ripe.net"),
"md"                =>  array("whois.nic.md"),
"mil"               =>  array("whois.nic.mil"),
"mk"                =>  array("whois.ripe.net"),
"ms"                =>  array("whois.nic.ms"),
"mt"                =>  array("whois.ripe.net"),
"mu"                =>  array("whois.nic.mu"),
"my"                =>  array("whois.mynic.net.my"),
"nf"                =>  array("whois.nic.cx"),
"pl"                =>  array("whois.dns.pl"),
"pr"                =>  array("whois.nic.pr"),
"pt"                =>  array("whois.dns.pt"),
"sa"                =>  array("saudinic.net.sa"),
"sb"                =>  array("whois.nic.net.sb"),
"sg"                =>  array("whois.nic.net.sg"),
"sh"                =>  array("whois.nic.sh"),
"si"                =>  array("whois.arnes.si"),
"sk"                =>  array("whois.sk-nic.sk"),
"sm"                =>  array("whois.ripe.net"),
"st"                =>  array("whois.nic.st"),
"su"                =>  array("whois.ripn.net"),
"tc"                =>  array("whois.adamsnames.tc"),
"tf"                =>  array("whois.nic.tf"),
"th"                =>  array("whois.thnic.net"),
"tj"                =>  array("whois.nic.tj"),
"tk"                =>  array("whois.nic.tk"),
"tl"                =>  array("whois.domains.tl"),
"tm"                =>  array("whois.nic.tm"),
"tn"                =>  array("whois.ripe.net"),
"to"                =>  array("whois.tonic.to"),
"tp"                =>  array("whois.domains.tl"),
"tr"                =>  array("whois.nic.tr"),
"ua"                =>  array("whois.ripe.net"),
"uy"                =>  array("nic.uy"),
"uz"                =>  array("whois.cctld.uz"),
"va"                =>  array("whois.ripe.net"),
"vc"                =>  array("whois2.afilias-grs.net"),
"ve"                =>  array("whois.nic.ve"),
"vg"                =>  array("whois.adamsnames.tc"),
"yu"                =>  array("whois.ripe.net")
);
public function whoislookup($domain)
{
$domain = trim($domain); //remove space from start and end of domain
if(substr(strtolower($domain), 0, 7) == "http://") $domain = substr($domain, 7); // remove http:// if included
if(substr(strtolower($domain), 0, 4) == "www.") $domain = substr($domain, 4);//remove www from domain
if(preg_match("/^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]).){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/",$domain))
return $this->queryWhois("whois.lacnic.net",$domain);
elseif(preg_match("/^([-a-z0-9]{2,100}).([a-z.]{2,8})$/i",$domain))
{
$domain_parts = explode(".", $domain);
$tld = strtolower(array_pop($domain_parts));
$server = $this->WHOIS_SERVERS[$tld][0];
if(!$server) {
return "Error: No appropriate Whois server found for $domain domain!";
}
$res=$this->queryWhois($server,$domain);
while(preg_match_all("/Whois Server: (.*)/", $res, $matches))
{
$server=array_pop($matches[1]);
$res=$this->queryWhois($server,$domain);
}
return $res;
}
else
return "Invalid Input";
}
private function queryWhois($server,$domain)
{
$fp = @fsockopen($server, 43, $errno, $errstr, 20) or die("Socket Error " . $errno . " - " . $errstr);
if($server=="whois.verisign-grs.com")
$domain="=".$domain;
fputs($fp, $domain . "\r\n");
$out = "";
while(!feof($fp)){
$out .= fgets($fp);
}
fclose($fp);
return $out;
}
}
?>

How to use?

<?
require("whoisClass.php");
$whois=new Whois;
echo $whois->whoislookup("Your domain or IP");
?>

Demo Download

Published by Sunny

A Mechanical engineer by education and web developer by passion and profession. He lives in Lucknow, India. Currently earning his livings by hitting keyboad. ;)

Join the Conversation

21 Comments

  1. Hi, I’m trying to validate an Email domain, I have tried many ways, but nothing works and this script say the next message ( using gmail.com domain or any valid domain):
    “Socket Error 0 – php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution”
    THX

  2. Try a domain like godaddy.com or microsoft.com, you don’t get the standard returned whois. Do you know what is up with that?

  3. Hi dear,
    first thanks for your script…

    when i try to work with script i done but result is a long string without any new line and all text concatenated, in script where can i add new line for it ???

    Thanks.

  4. keep getting error code:

    Fatal error: Cannot redeclare class Whois error

    That is because the “Whois” class was already declared in the whois.php file, so the whoisClass.php throws the error. However, when I change the class name, the code breaks. Any ideas?

    1. Hello i had the similar problem like yours as i also not a programmer after searching a lot I found the code which is similar to the above and it works fine below is the link

  5. I’ve tried adding this as a code to WordPress using a ‘Global Content Blocks’
    And when run it states “Parse error: syntax error, unexpected ‘ ‘ (T_STRING), expecting ‘)’ in /home/content/95/7248795/html/whoisClass.php on line 4”

    Any clues?
    As above, your demo page looks different in code than this info above.

  6. Bug report -> at line #176, backslashes are missing before each control character : “rn” should be “\r\n”.
    Thank you anyway for this very useful class 🙂

  7. At the moment use the function “whoislookup”, I throw the following error:

    Socket Error 101 – Network is unreachable

    Do I need to do any additional configuration?
    Are any domain certificates required?

  8. Pingback: Cauti Rotld Whoi?
Leave a comment

Your email address will not be published. Required fields are marked *