secure apache php in virtualhosting

[pointers]

hi,
Is there any document showing how to install both apache and php securely in a virtual hosting environment. There are lots of documents many have lack of functionality.I just want to secure my apache and php environment without limiting functionality of the system so that users will not complain about lots of errors due to few permissions

thanks alot..

[marting]

two things come to my mind:

- make home-dirs only readable by users and apache-user
- use safe_mode in php (so the users can only execute the scripts they own)

i don't know if there's the need (and option) to run apache in a chrooted environment.