Whois

cWhois is a PHP script that can check the availability of a domain name and if required retrieve the registration details. cWhois works with over 800 domain extensions such as .com, .co.uk, .ro, .name, .de etc. Supports IDN and DAS required by some whois servers. The script can be used as a PHP function or with the supplied form handler and example pages. For a limited time you will also receive cWhois Domain Cart free if you purchase cWhois.

This class checks the availability of a domain, gets the whois data and more. Supports a variety of tlds.

phpWhoiz0r is a php script that makes a network connection to network solutions to request whois information. It is exreamly easy to setup and will work on any platform.