- How much is it to use this script?
Free, but attribution is required on the page using this script. - What if I just want to use only part of the script?
Free, but attribution is required on the page using any part of this script.
- What if I just want the PHP function that checks whether a domain is freely available and returns a boolean?
Free, but attribution is required on the page using any part of this script. - What if I am not comfortable with attributing as required?
US$20 for the waiver of requirement to attribute. The link to checkout can be found in the download page. - I keep getting an error 'Error connecting to server'?
Check that your hosting server allows outgoing connections. Many don't. GoDaddy is one of them. Or the whois server could be down.
Also, the AJAX call may fail if you have too much output before the include. To work around this, place this code at the very first line of the file that is having the include statement:
<? ob_start(); ?>
This will buffer all the responses and the AJAX call should work. - What are the requirements to run this script?
PHP 4 and PHP 5 is fine. MySQL is not needed. Server must be allowed to make external connections. Some servers such as GoDaddy do not allow this. Perl Compatible Regular Expressions (PCRE), which should be enabled in 99.99% of the installations, is also needed to validate inputs. - I have some other problem...
Contact me personally WITH the URL of your implementation