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function whois_query（$domain） {// fix the domain name:$domain = strtolower（trim（$domain））;$domain = preg_replace（"/^http:///i", "", $domain）;$domain = preg_replace（"/^www./i", "", $domain）;$domain = explode（"/", $domain）;$domain = trim（$domain[0]）;// split the TLD from domain name$_domain = explode（".", $domain）;$lst = count（$_domain）-1;$ext = $_domain[$lst];// You find resources and lists // like these on wikipedia: //// http://de.wikipedia.org/wiki/Whois//$servers = array（"biz" => "whois.neulevel.biz","com" => "whois.internic.net","us" => "whois.nic.us","coop" => "whois.nic.coop","info" => "whois.nic.info","name" => "whois.nic.name","net" => "whois.internic.net","gov" => "whois.nic.gov","edu" => "whois.internic.net","mil" => "rs.internic.net","int" => "whois.iana.org","ac" => "whois.nic.ac","ae" => "whois.uaenic.ae","at" => "whois.ripe.net","au" => "whois.aunic.net","be" => "whois.dns.be","bg" => "whois.ripe.net","br" => "whois.registro.br","bz" => "whois.belizenic.bz","ca" => "whois.cira.ca","cc" => "whois.nic.cc","ch" => "whois.nic.ch","cl" => "whois.nic.cl","cn" => "whois.cnnic.net.cn","cz" => "whois.nic.cz","de" => "whois.nic.de","fr" => "whois.nic.fr","hu" => "whois.nic.hu","ie" => "whois.domainregistry.ie","il" => "whois.isoc.org.il","in" => "whois.ncst.ernet.in","ir" => "whois.nic.ir","mc" => "whois.ripe.net","to" => "whois.tonic.to","tv" => "whois.tv","ru" => "whois.ripn.net","org" => "whois.pir.org","aero" => "whois.information.aero","nl" => "whois.domain-registry.nl"）;if （！isset（$servers[$ext]））{die（"Error: No matching nic server found！"）;}$nic_server = $servers[$ext];$output = "";// connect to whois server:if （$conn = fsockopen （$nic_server, 43）） {fputs（$conn, $domain."
"）;while（！feof（$conn）） {$output .= fgets（$conn,128）;}fclose（$conn）;}else { die（"Error: Could not connect to " . $nic_server . "！"）; }return $output;}// Some example queries:print whois_query（"jonasjohn.de"）;print whois_query（"example.com"）;print whois_query（"example.org"）;