PHP 5.2 or newer

[IulianH]

Can I upgrade PHP to PHP 5.3 ?

I have installed Plesk 9.2

 

[atomicturtle]

I have PHP 5.2 rpms available in the atomic repo. 5.3 is an option, just be aware that all kinds of changes have been made that you should check your PHP code against.

For example I think that horde isn't compatible with it yet.