Hi there,
I had a similar issue and after searching around for an answer, I found the below on an Ubuntu Server forum.
I tried: sudo apt-get install libapache2-mod-php5
It installed a module (libphp5.so has appeared) uninstalled another (libphp5filter.so seems to have gone). Re-installed FOG 1.2.0 and hey presto “it works”. Updated the schema and I am back in and working.