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[PHP] Whois query using PHP

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f you need to get the whois information for a specific domain, why not using PHP to do it? The following function take a domain name as a parameter, and then display the whois info related to the domain.

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  1. function whois_query($domain) {
  2.  
  3.     // fix the domain name:
  4.     $domain = strtolower(trim($domain));
  5.     $domain = preg_replace('/^http:\/\//i', '', $domain);
  6.     $domain = preg_replace('/^www\./i', '', $domain);
  7.     $domain = explode('/', $domain);
  8.     $domain = trim($domain[0]);
  9.  
  10.     // split the TLD from domain name
  11.     $_domain = explode('.', $domain);
  12.     $lst = count($_domain)-1;
  13.     $ext = $_domain[$lst];
  14.  
  15.     // You find resources and lists 
  16.     // like these on wikipedia: 
  17.     //
  18.     // http://de.wikipedia.org/wiki/Whois
  19.     //
  20.     $servers = array(
  21.         "biz" => "whois.neulevel.biz",
  22.         "com" => "whois.internic.net",
  23.         "us" => "whois.nic.us",
  24.         "coop" => "whois.nic.coop",
  25.         "info" => "whois.nic.info",
  26.         "name" => "whois.nic.name",
  27.         "net" => "whois.internic.net",
  28.         "gov" => "whois.nic.gov",
  29.         "edu" => "whois.internic.net",
  30.         "mil" => "rs.internic.net",
  31.         "int" => "whois.iana.org",
  32.         "ac" => "whois.nic.ac",
  33.         "ae" => "whois.uaenic.ae",
  34.         "at" => "whois.ripe.net",
  35.         "au" => "whois.aunic.net",
  36.         "be" => "whois.dns.be",
  37.         "bg" => "whois.ripe.net",
  38.         "br" => "whois.registro.br",
  39.         "bz" => "whois.belizenic.bz",
  40.         "ca" => "whois.cira.ca",
  41.         "cc" => "whois.nic.cc",
  42.         "ch" => "whois.nic.ch",
  43.         "cl" => "whois.nic.cl",
  44.         "cn" => "whois.cnnic.net.cn",
  45.         "cz" => "whois.nic.cz",
  46.         "de" => "whois.nic.de",
  47.         "fr" => "whois.nic.fr",
  48.         "hu" => "whois.nic.hu",
  49.         "ie" => "whois.domainregistry.ie",
  50.         "il" => "whois.isoc.org.il",
  51.         "in" => "whois.ncst.ernet.in",
  52.         "ir" => "whois.nic.ir",
  53.         "mc" => "whois.ripe.net",
  54.         "to" => "whois.tonic.to",
  55.         "tv" => "whois.tv",
  56.         "ru" => "whois.ripn.net",
  57.         "org" => "whois.pir.org",
  58.         "aero" => "whois.information.aero",
  59.         "nl" => "whois.domain-registry.nl"
  60.     );
  61.  
  62.     if (!isset($servers[$ext])){
  63.         die('Error: No matching nic server found!');
  64.     }
  65.  
  66.     $nic_server = $servers[$ext];
  67.  
  68.     $output = '';
  69.  
  70.     // connect to whois server:
  71.     if ($conn = fsockopen ($nic_server, 43)) {
  72.         fputs($conn, $domain."
  73. ");
  74.         while(!feof($conn)) {
  75.             $output .= fgets($conn,128);
  76.         }
  77.         fclose($conn);
  78.     }
  79.     else { die('Error: Could not connect to ' . $nic_server . '!'); }
  80.  
  81.     return $output;
  82. }

URL: http://www.jonasjohn.de/snippets/php/whois-query.htm

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