We offer both PHP 4.4 and 5.2 on our Linux shared hosting plans, and PHP 5.2 on our windows shared hosting plans. Please note that if you are on one of our older hosting plans (through Direct Admin or Helm) then you may be on an older version of PHP that can not be upgraded.
Our new shared hosting plans (Minimus, Medius, Maximus) offer you the choice between php4 and php5 and you can change the PHP version in cp.blacknight.com under:
Websites >> domainnanme >> Website Configuration
To get PHP 5 support disable PHP 4 entirely as otherwise PHP 5 will only act on files with the extension .php5
If you want to get the exact PHP version of your domain you can write a php info page, as this can vary slightly from server to server. For writing a php info page please see here: