I want to contribute a plugin to the project but I have a lot of php rust to knock off, first. It would be helpful if I had an easy way to dump variables to the screen and/or log so I can easily see the code in action.

I tried the debug_logger plugin but it seems badly out of date. An issue has been filed here: https://github.com/roundcube/roundcubemail/issues/8041.

So I'm curious to know what tools other developers are using to help them develop with roundcube. Thanks.