A few years ago I installed Apache 2.2x and PHP 5.3.1 on a Linux server I maintain. I used .tar.gz\'s and built them as instructed (instead of rpms and what-have-you). And
You can get more info about your config files using something like:
$ -> php -i | ack config # Use fgrep -i if you don't have ack Configure Command => './configure' ... Loaded Configuration File => /path/to/php.ini