I would like to know how i can get XDebug work with Aptana Studio 3 (I already have Aptana Studio 3 on this machine with XAMPP).
Do you know a recent article telling me
At the moment, there is no PHP debugger support in Aptana Studio 3. However, there will be soon. See: http://jira.appcelerator.org/browse/APSTUD-769 and add yourself as a watcher to get informed when it's done.
For now, you can install PDT from eclipse.org if you really need to debug. They also provide up-to-date docs on how to use it. There is a small learning curve, but it will work pretty much the same in Aptana (once it's released), so you have nothing to lose :)