Debugging in PHP with XDebug

Debugging in PHP does not necessarily mean "print" or "log" debugging, even if one's using Lampp.

While checking out how to set up a good Joomla! 3 development environment, I've learned how to set up XDebug and configure it for PHP debugging.
Just check the correct XDebug version numbers and don't just "copy-paste" the settings.

./M6