Can't find php.ini on my Linux/Apache module install

I can't seem to locate the php.ini file on my system. Here's some pertinent info from phpinfo(): PHP Version 4.0.4pl1 System Linux i686 unknown Configure Command './configure' '--with-mysql' '--with-apxs' '--enable-versioning' Server API Apache Configuration File (php.ini) Path /usr/local/lib find -name php.ini reveals no php.ini file. /usr/local/lib contains a php directory. The php directory seems to only contain PHP 4.0 source code. There IS a php3.ini file on the system, from a previous install. Is there any chance that this file is still being used? Where SHOULD this file be? And how do I find out for sure which one it is? Is it possible that it doesn't exist? If not, does that mean I could create one in /usr/local/lib? Where am I supposed to get a default version? Thanks, Ken