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WhoIs Query in PHP

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This code allows to perform a query to WhoIs service in PHP.

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

URL: www.apphp.com/index.php?snippet=php-whois-query

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