New this morning over on Zend.com is an article by a friend of mine covering JavaScript Powered PHP Debugging.

I've seen the script that he shows here, and it can be quite useful for those out there that like a bit more robust debugging environment. This article shows you how to write your errors and debugging information to a separate popup window using dynamic Javascript written by your PHP. Of course, they give you all the code and examples to help you put this feature into your own application, and even provide it all in a handy class that you can extend or include for easy use.

I think that things like this would be a great addition to the PHP language itself, allowing a separate window to be your "debugger" for your information, and keeping your site intact, as well as not messing up your layout...