File locations for mysql

Hi All,
I have a MacOSX server which I am trying the setup both Mysql and PHP on so I can start learning. Turning on Mysql seemed easy, and PHP was fine too. I know both are running and I’ve tested both.

I also know that there is an issue with the socket location for these two on OSX and have the necessary information from apple to modify the php.ini file. What I can’t do is find the file to do the editing!

Can some one point me in the right direction?