This function returns the WhoIs string for the passed domain name (such as the domain-name owner and nameservers) by opening a socket to a WhoIs server.

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1. <?
2. function WhoIs($DomainName)
3. {
5.  // Open a socket to geektools.com, one of the whois servers
6.  $Socket = fsockopen(“www.geektools.com”, 43, $ErrorNum, $ErrorStr) or die(“$errno: $errstr”);
7.  fputs($Socket, $DomainName.“\n“);
8.  // Receive data from the whois server and put into a string
9.  while(!feof($Socket))
10.  {
11.  $WhoIsString .= fgets($Socket, 2048);
12.  }
13.  // Close the stream and return the string
14.  fclose($Socket);
15.  return $WhoIsString;
16. }
18. // Sample use of the WhoIs service
19. echo “Who Is Geekpedia.com?<br />”;
20. echo “<pre>”.WhoIs(“geekpedia.com”).“</pre>”;
21. ?>