MySQL replication: [closed]

Question

This is a really dumb question, but here goes.

1. I've got one web server, running a simple PHP app.
2. I've got two MySQL servers, with one replicated database, which powers the PHP app. I'm using two MySQL databases to deal with demand.
3. How can I (and indeed, can I) get the PHP app to alternate which MySQL server it uses?

The line where I connect to the database is currently this:

$con = mysql_connect('10.0.0.2:3306','name','password')
or die('Could not connect to the server!');

Is there a way I can load-balance with 10.0.0.2 and my other server?