AJAX Domain Availability Check by Singapore Web Design Hosting is licensed under a Creative Commons Attribution 3.0 License.
Based on a work at http://www.mattjewell.com/namepros/dnlookup/ (domain expired).

NOTICE
If you want to use this script on your website, you MUST attribute by placing the link as required clearly on the page that it is being used. I have noticed many implementations not following this requirement and this is VERY DISCOURAGING :( :( . If this continues, I would be forced to take EXTREME measures such as EMAIL-ME-TO-DOWNLOAD or even PAY-TO-DOWNLOAD. I don't think anyone wants such inconveniences, do you?
To licence or use this script, you MUST place the link as stated in the Attribution section. If the code is not copied exactly to the page using this script, it is a VIOLATION of the licence and you are using this script illegally. If you don't want to attribute, you can pay USD20 and we'll waive the requirement to attribute.
Here are some people who copied the code without attributing back *properly* - they are using this script ILLEGALLY
Seriously, WTF guys? I am just asking for a link back?! Even if its a small link, I am OK with it as long as it appears somewhere on the page.
I've removed the download thanks to people stealing the code and using it without attributing to us as nicely requested.
Till I ponder how to restore the free download while maintaining the attribution, the files will be offline. If you want to get the files, contact me with the *EXACT* URL of where the script will be placed.
Just use php's include function to include the respective PHP file. It is that easy!
<? include ('ajax_checker.php'); ?>
Note that dnservers.php has to be in the same folder.
If you just want to use the PHP function, the name is 'isDomainAvailable($domain)'. The returned result is correct as long as $error, a global variable, is empty. Any errors will be stored in $error. Remember, you must still attribute if you use any part of that function.