In my project users are allowed to upload files of any type. I need to ensure security against execution of uploaded files that can parsed by php (*.php, *.html, etc.)
You want the Apache SetHandler directive: http://httpd.apache.org/docs/current/mod/core.html#sethandler
This lets you force all files in a directory to be processed by a certain handler. So something along the lines of:
SetHandler None
should do what you want.