upgrade php on slackware 10.0

Hi

I've been using php for about two years on slackware, which comes prebuilt with Apache MySql and php.

I have never upgrade php before and was wanting to be able to try out newer version.

I was thinking I could down load a newer version, compile it and create a symbolic link call php to point to which version I wanted to run.

I don't even know where slackware 10.0 puts, configures etc php.

any one out there know what I talking about and could shoot me a tutorial or something? that would make it really easy to try out newer versions of php with slackware.