修改自网上流传的版本，并作了修正：
增加了两百多种域名的支持；
修正了过期时间解析错误的BUG，改进了效率。
<?php
if(!isset($_GET['domain'])){
echo "1.您未指定要查询的域名！<br />";
echo "2.接口使用方法：/whois.php?domain=<FONT color=#ff0000>域名</FONT><br />";
echo "3.<FONT color=#ff0000>域名</FONT>请勿加<FONT color=#ff0000>www.</FONT><br />";
exit;
}
$domain = $_GET['domain'];
class SearchDomain
{
private $arr_whois_servers = array(
'com'=>'whois.internic.net',
'net'=>'whois.internic.net',
'org'=>'whois.pir.org',
'asia'=>'whois.crsnic.net',
'ac'=>'whois.nic.uk',
'ad'=>'whois.nic.ad',
'ae'=>'whois.uaenic.ae',
'ag'=>'whois.nic.ag',
'ai'=>'whois.offshore.com.ai',
'al'=>'whois.inima.al',
'an'=>'whois.una.net',
'ao'=>'whois.fccn.pt',
'aq'=>'whois.nsrc.org',
'ar'=>'whois.nic.ar',
'as'=>'whois.nic.as',
'am'=>'whois.amnic.net',
'au'=>'whois.amnic.net',
'at'=>'whois.amnic.net',
'az'=>'whois.domain.az',
'ba'=>'whois.utic.net.ba',
'bb'=>'whois.domains.org.bb',
'be'=>'whois.dns.be',
'bf'=>'whois.onatel.bf',
'bg'=>'whois.digsys.bg',
'bh'=>'whois.batelco.com.bh',
'bi'=>'whois.nic.bi',
'biz'=>'whois.nic.biz',
'bm'=>'whois.bermudanic.bm',
'bn'=>'whois.brunet.bn',
'bo'=>'whois.digsys.bo',
'by'=>'whois.unibel.by',
'bz'=>'whois.belizenic.bz',
'br'=>'whois.registro.fapesp.br',
'bt'=>'whois.nic.bt',
'bv'=>'whois.norid.no',
'ca'=>'whois.cira.ca',
'cc'=>'whois.nic.cc',
'cd'=>'whois.nic.cd',
'cf'=>'whois.socatel.intnet.cf',
'cg'=>'whois.nic.cg',
'ch'=>'whois.nic.ch',
'ci'=>'whois.aipdi.ci',
'ck'=>'whois.oyster.net.ck',
'cl'=>'whois.nic.cl',
'cm'=>'whois.info.intelcam.cm',
'cn'=>'whois.cnnic.net.cn',
'co'=>'whois.nic.uniandes.edu.co',
'coop'=>'whois.nic.coop',
'cu'=>'whois.nic.cu',
'cx'=>'whois.nic.cx',
'cy'=>'whois.nic.cy',
'cz'=>'whois.nic.cz',
'de'=>'whois.denic.de',
'dk'=>'whois.dk-hostmaster.dk',
'dj'=>'whois.intnet.dj',
'do'=>'whois.nic.do',
'dz'=>'whois.nic.dz',
'ec'=>'whois.nic.ec',
'edu'=>'whois.educause.net',
'ee'=>'whois.eenet.ee',
'eg'=>'whois.frcu.eun.eg',
'es'=>'whois.nic.es',
'et'=>'whois.telecom.net.et',
'fi'=>'whois.ripe.net',
'fj'=>'whois.usp.ac.fj',
'fk'=>'whois.fidc.org.fk',
'fm'=>'whois.dot.fm',
'fo'=>'whois.nic.fo',
'fr'=>'whois.nic.fr',
'gb'=>'whois.nic.uk',
'ge'=>'whois.nic.net.ge',
'gf'=>'whois.nplus.gf',
'gg'=>'whois.nic.gg',
'gh'=>'whois.ghana.com',
'gi'=>'whois.gibnet.gi',
'gl'=>'whois.nic.gl',
'gm'=>'whois.nic.gm',
'gn'=>'whois.psg.com',
'gov'=>'whois.nic.gov',
'gp'=>'whois.nic.gp',
'gq'=>'whois.getesa.gq',
'gr'=>'whois.hostmaster.gr',
'gs'=>'whois.adamsnames.tc',
'gt'=>'whois.uvg.edu.gt',
'gu'=>'whois.gadao.gov.gu',
'hk'=>'whois.hkdnr.net.hk',
'hm'=>'whois.registry.hm',
'hn'=>'whois.nic.hn',
'hr'=>'whois.carnet.hr',
'hu'=>'whois.nic.hu',
'id'=>'whois.idnet.net.id',
'ie'=>'whois.domainregistry.ie',
'il'=>'whois.isoc.org.il',
'im'=>'whois.nic.im',
'in'=>'whois.domain.ncst.ernet.in',
'info'=>'whois.afilias.com',
'int'=>'whois.iana.org',
'io'=>'whois.nic.io',
'ir'=>'whois.nic.ir',
'is'=>'whois.isnic.is',
'it'=>'whois.nic.it',
'je'=>'whois.isles.net',
'jo'=>'whois.nic.net.jo',
'jp'=>'whois.nic.ad.jp',
'ke'=>'whois.nbnet.co.ke',
'kg'=>'whois.domain.kg',
'kh'=>'whois.mptc.gov.kh',
'kn'=>'whois.clu.edu',
'kr'=>'whois.nic.or.kr',
'kw'=>'whois.domainname.net.kw',
'kz'=>'whois.domain.kz',
'lb'=>'whois.aub.edu.lb',
'lc'=>'whois.isisworld.lc',
'li'=>'whois.nic.li',
'lk'=>'whois.nic.lk',
'lr'=>'whois.psg.com',
'ls'=>'whois.co.ls',
'lt'=>'whois.domreg.lt',
'lu'=>'whois.dns.lu',
'lv'=>'whois.nic.lv',
'ly'=>'whois.nic.ly',
'ma'=>'whois.iam.ma',
'mc'=>'whois.nic.mc',
'md'=>'whois.ripe.net',
'mil'=>'whois.nic.mil',
'mg'=>'whois.orstom.mg',
'mh'=>'whois.nic.net.mh',
'mk'=>'whois.mpt.com.mk',
'mm'=>'whois.nic.mm',
'mn'=>'whois.nic.mn',
'mo'=>'whois.umac.mo',
'mp'=>'whois.marketplace.mp',
'mq'=>'whois.nic.mq',
'mr'=>'whois.univ-mkc.mr',
'ms'=>'whois.adamsnames.tc',
'mt'=>'whois.um.edu.mt',
'mu'=>'whois.posix.co.za',
'mw'=>'whois.tarsus.net',
'mx'=>'whois.nic.mx',
'my'=>'whois.mynic.net.my',
'mz'=>'whois.nambu.uem.mz',
'na'=>'na-nic.com.na',
'name'=>'whois.nic.name',
'nc'=>'whois.norstom.nc',
'nf'=>'whois.names.nf',
'ni'=>'whois.nic.ni',
'nl'=>'whois.domain-registry.nl',
'no'=>'whois.norid.no',
'np'=>'whois.mos.com.np',
'nu'=>'whois.nic.nu',
'nz'=>'whois.domainz.net.nz',
'om'=>'whois.gto.net.om',
'pa'=>'whois.nic.pa',
'pe'=>'whois.ekeko.rcp.net.pe',
'ph'=>'whois.domreg.org.ph',
'pg'=>'whois.unitech.ac.pg',
'pk'=>'whois.pknic.net.pk',
'pl'=>'whois.nask.pl',
'pm'=>'whois.nic.pm',
'pn'=>'whois.nic.pn',
'pr'=>'whois.uprr.pr',
'ps'=>'whois.nic.ps',
'pt'=>'whois.fccn.pt',
'py'=>'whois.nic.py',
'qa'=>'whois.qatar.net.qa',
're'=>'whois.nic.fr',
'ro'=>'whois.rnc.ro',
'ru'=>'whois.ripn.net',
'rw'=>'whois.nic.rw',
'sa'=>'whois.saudinic.net.sa',
'sb'=>'whois.sbnic.net.sb',
'sd'=>'whois.sudatel.sd',
'se'=>'whois.nic-se.se',
'sg'=>'whois.nic.net.sg',
'sh'=>'whois.nic.sh',
'si'=>'whois.arnes.si',
'sj'=>'whois.norid.no',
'sk'=>'whois.sk-nic.sk',
'sm'=>'whois.intelcom.sm',
'sn'=>'whois.nic.sn',
'so'=>'whois.nic.so',
'st'=>'whois.st-registry.tecnisys.net',
'su'=>'whois.ripn.net',
'sv'=>'whois.svnet.org.sv',
'sz'=>'whois.iafrica.sz',
'tc'=>'whois.adamsnames.tc',
'td'=>'whois.tit.td',
'tf'=>'whois.adamsnames.tc',
'tg'=>'whois.nic.tg',
'th'=>'whois.thnic.net',
'tj'=>'whois.nic.tj',
'tm'=>'whois.nic.tm',
'tn'=>'whois.ati.tn',
'to'=>'whois.tonic.to',
'tp'=>'whois.nic.tp',
'tr'=>'whois.metu.edu.tr',
'tt'=>'whois.nic.tt',
'tw'=>'whois.twnic.net',
'tz'=>'whois.psg.com',
'tv'=>'whois.networksolutions.com',
'ua'=>'nic.net.ua',
'ug'=>'whois.nic.ug',
'uk'=>'whois.nic.uk',
'uk'=>'whois.ripe.net',
'um'=>'whois.isi.edu',
'us'=>'whois.nic.us',
'uy'=>'whois.rau.edu.uy',
'uz'=>'whois.freenet.uz',
've'=>'whois.nic.ve',
'wf'=>'whois.nic.fr',
'vg'=>'whois.adamsnames.tc',
'vi'=>'whois.nic.vi',
'vn'=>'whois.batin.com.vn',
'vu'=>'whois.vunic.vu',
'ws'=>'samoanic.ws',
'yt'=>'whois.nic.fr',
'yu'=>'whois.nic.yu',
'za'=>'whois.co.za',
'zm'=>'whois.zamnet.zm',
);
public $domain="";
function SetDomain($udomain)
{
$this->domain = $udomain;
}
function GetInfo()
{
$wl = "";
$w_server = $this->GetServer();
if($w_server=="") return "";
$fp = fsockopen($w_server, 43, $errno, $errstr, 30);
if(!$fp) {
echo $errstr;
return "";
}
$out = $this->domain."";
$out .= "Connection: Close";
fputs($fp, $out);
while (!feof($fp))
{
$wl = fgets($fp, 255);
if(preg_match("/no match/",$wl))
{
fclose($fp);
return "ok";
}
if(preg_match("/Expiration Date/",$wl))
{
$lines = explode(":",$wl);
$t = trim($lines[1]);
$ts = explode(" ",$t);
$t = $ts[0];
if(preg_match("/[^0-9-]/",$t))
{
return date("Y-m-d",strtotime($t));
}
fclose($fp);
return '';
}
}
fclose($fp);
return "";
}
//
//获得域名的整个whois信息
//
function GetWhois()
{
$wh = "";
$w_server = $this->GetServer();
if($w_server=="") return "";
$fp = fsockopen($w_server, 43, $errno, $errstr, 30);
if(!$fp)
{
echo $errstr;
return "";
}
$out = $this->domain."";
$out .= "Connection: Close";
fputs($fp, $out);
while (!feof($fp))
{
$wh .= nl2br(fgets($fp, 255));
}
fclose($fp);
return $wh;
}
//
//输出当前域名的状态信息
//
function PrintSta()
{
$rs = $this->GetInfo();
if($rs=="ok") echo $this->domain." 未注册！<br/>";
else if($rs=="") echo "无法查询 ".$this->domain." 状态！<br/>";
else echo $this->domain." 已注册，到期时间：$rs<br/>";
}
//
//获得 whois 查询服务器
//
function GetServer()
{
$udomain=strtolower(substr(strrchr($this->domain,'.'),1));
return array_key_exists($udomain,$this->arr_whois_servers) ? $this->arr_whois_servers[$udomain] : '';
}
//
//英语的月份转为数字
//
function MonthToNum($m)
{
echo $m;
$m = strtolower($m);
for($i=1;$i<=12;$i++)
{
$tt = mktime(0,0,0,$i+1,0,2005);
if($m==strtolower(strftime("%b",$tt)))
{
if($i>9) return $i-1;
else return "0".$i-1;
}
}
}
}
$sd = new SearchDomain();
$sd->SetDomain("$domain");
//查询域名是否被注册，等价于 $sd->PrintSta();
$rs = $sd->GetInfo();
if($rs=="ok") echo $sd->domain." 未注册！<br/>";
else if($rs=="") echo "无法查询 ".$sd->domain." 状态！<br/>";
else echo $sd->domain." 已注册，到期时间：$rs<br/>";
//获得域名的详细whois信息
//echo $sd->GetWhois();
?> 请注意：经进一步使用发现上面的whois server返回的并不是统一格式的信息，并且部分whois
server无响应。部分小后缀域名是无法查询的，还需要进一步处理。（举例，.kr返回韩文数据，.fr,.de返回某种协议的格式，而.ru返回了另
一种格式的协议，说明页面是俄文的。）
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