Php 5.2...where is it ?

I have been installing your software.
Although it takes some getting used to I think I have it up and runinng now.

I also get updates and mongst these was roundcube webmail.
I want to offer tis to my users but it bombs out during install with the remark that it needs Php 5.2.

I cannot find any info anywhere on where or how to update to php 5.2 and if this is supported at all on this server.

Woud appreciate some help

Closed (fixed)