Update: This is now fixed with the latest module update Greetings, So I have the following bug when I extracted the PHP 5.5 module to a fresh copy of UniServer Zero 10.0.4 (to the core folder) further more after those errors are shown and I clicked "OK", viewing phpinfo() I get PHP version of 5.4.16 (I'm on Windows 7 x64) Also note if I run from the command line I get no error but the version of PHP is shown as 5.5.0beta2 however 5.5 is fully released now and is not in beta anymore.