[FX.php List] calling DB on other server

[L.M.Loeffel]

Please excuse my newbie-ness,

I am testing out how to have my html files on one hosting server, while 
calling my database on another hosting server.  In my first and only 
fx.php site, I had everything on one server.

I'm duplicating my first fx.php sites files exactly to avoid unknowns 
at this point. I am repurposing a page that starts like this:

<?
include_once('FX/FX.php');
include_once('FX/FMErrors.php');
include_once('FX/server_data.php');

  $returnCount = 20; // new


  $query = new FX($serverIP,$webCompanionPort,'FMPro7');

Is the segment that says $serverIP supposed to tell the server address? 
Where do I indicate the location of the db server?

Also - is there a book out about FX.PHP with Filemaker? I would feel 
less stupid looking up things in private, rather than showing everyone 
what I don't know :)

Thanks,
-Lynn