Recipe 16.11. Getting Information About a Domain Name


16.11.1. Problem

You want to look up contact information or other details about a domain name.

16.11.2. Solution

Use PEAR's Net_Whois class:

require 'Net/Whois.php'; $server = 'whois.networksolutions.com'; $query  = 'example.org'; $data = Net_Whois::query($server, $query);

16.11.3. Discussion

The Net_Whois::query( ) method returns a large text string whose contents reinforce how hard it can be to parse different Whois results:

Registrant: Internet Assigned Numbers Authority (EXAMPLE2-DOM)    4676 Admiralty Way, Suite 330    Marina del Rey, CA 90292    US    Domain Name: EXAMPLE.ORG    Administrative Contact, Technical Contact, Billing Contact:       Internet Assigned Numbers Authority  (IANA)  iana@IANA.ORG       4676 Admiralty Way, Suite 330       Marina del Rey, CA 90292       US       310-823-9358       Fax- 310-823-8649    Record last updated on 07-Jan-2002.    Record expires on 01-Sep-2009.    Record created on 31-Aug-1995.    Database last updated on 6-Apr-2002 02:56:00 EST.    Domain servers in listed order:    A.IANA-SERVERS.NET                192.0.34.43    B.IANA-SERVERS.NET                193.0.0.236

For instance, if you want to parse out the names and IP addresses of the domain name servers, use this:

preg_match_all('/^\s*([\S]+)\s+([\d.]+)\s*$/m', $data, $dns,                PREG_SET_ORDER); foreach ($dns as $server) {     print "$server[1] : $server[2]\n"; }

You must set $server to the correct Whois server for a domain to get information about that domain. If you don't know the server to use, query whois.internic.net:

require 'Net/Whois.php'; print Net_Whois::query('whois.internic.net','example.org'); require 'Net/Whois.php'; print Net_Whois::query('whois.internic.net','example.org'); [whois.internic.net] Whois Server Version 1.3 Domain names in the .com, .net, and .org domains can now be registered with many different competing registrars. Go to http://www.internic.net for detailed information.    Domain Name: EXAMPLE.ORG    Registrar: NETWORK SOLUTIONS, INC.    Whois Server: whois.networksolutions.com    Referral URL: http://www.networksolutions.com    Name Server: A.IANA-SERVERS.NET    Name Server: B.IANA-SERVERS.NET    Updated Date: 19-aug-2002 >>> Last update of whois database: Wed, 21 Aug 2002 04:56:56 EDT <<< The Registry database contains ONLY .COM, .NET, .ORG, .EDU domains and Registrars.

The Whois Server: line says that the correct server to ask for information about example.org is whois.networksolutions.com.

16.11.4. See Also

PEAR's Net_Whois class at http://pear.php.net/package-info.php?package=Net_Whois.




PHP Cookbook, 2nd Edition
PHP Cookbook: Solutions and Examples for PHP Programmers
ISBN: 0596101015
EAN: 2147483647
Year: 2006
Pages: 445

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