How to check availability of domains (whois) with php?

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Question :

How to check the availability of a national (.br) domain and / or others using PHP?
Is there any php class ready for this?

    

Answer :

This model besides displaying availability has a modal with all the information.

<!DOCTYPE html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script><scriptlanguage="javascript" src="/colorbox/jquery.colorbox.js"></script>
<link rel="stylesheet" type="text/css" href="/colorbox/colorbox.css">
<script>
$(document).ready(function(){
$(".inline").colorbox({inline:true, width:"60%", height:"60%"});
});
</script>

</head>

<?php
error_reporting(E_ALL & ~ E_NOTICE);
#######################################################################
# PHP Whois Lookup Class
# Script Url: http://99webtools.com/php-whois-script.php
# Author: Sunny Verma
# Email: er.sunny.verma@gmail.com
# Website: http://99webtools.com
# License: GPL 2.0, @see http://www.gnu.org/licenses/gpl-2.0.html
########################################################################
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: Nenhum servidor WHOIS apropriado encontrado para o domínio $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 $res;
}
else
return "invalido";
}
private function queryWhois($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 . "rn");
$out = "";
while(!feof($fp)){
$out .= fgets($fp);
}
fclose($fp);
return $out;
}
}

if ($_POST["dominio"]){
$dominio=$_POST["dominio"];
$whois=new Whois;

$result= $whois->whoislookup($dominio);

$result="<p>".$result."</p>";

$pos = strpos($result, "invalido");
if ($pos === false) {
$pos = strpos($result, "No match for");
if ($pos === false) {
echo "Dominio registrado";
echo "<br><a class='inline' href="#inline_content"" title=""Whois "".$dominio."""">

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