每个顶级域名会有不同的whois服务器，比如.COM域名的服务器是whois.verisign-grs.com。如果我们需要制作域名查询WHOIS脚本的时候需要用到各个查询接口的API，下面老董整理到一份基于43种常用后缀域名的查询类，如果有需要用到的直接可以引用。
<?phpclassWhois{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"));publicfunctionwhoislookup($domain){$domain= trim($domain);//remove space from start and end of domainif(substr(strtolower($domain), 0, 7) =="http://")$domain=substr($domain, 7); // remove http://ifincludedif(substr(strtolower($domain), 0, 4) =="www.")$domain=substr($domain, 4);//remove www from domainif(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;}elsereturn"Invalid Input";}privatefunctionqueryWhois($server,$domain){$fp= @fsockopen($server, 43,$errno,$errstr, 20)ordie("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;}}?>
把上面的脚本保存到whois.php文件中，然后我们可以用这样调用。
<?
require("whois.php")
$whois=new Whois;
echo $whois->whoislookup("Your domain or IP");
?>
具体可以根据自己的需要灵活应用到网站中。