Hazard Whois
I needed this for a project I’m working on. I have one upgrade planned but this is the basic script. It will get the whois details for any domain name that is registered anywhere. No need to update a file with whois server addresses or anything of that sort.
Downloaded 6608 times
Demo: Coming Soon
Download Hazard.Whois.zip now
Still supported, update coming very soon

Great Work Buddy
you should look at configuring this to a Plugin for WordPress
That would rock, and also be able to just return > Registered / unavailable, and provide a option to then run a further lookup