qohen's Journal: PHP Debugging tools/techniques in comments: php.net/var_dump

There's a bunch of stuff in the comments, everything from the old print '';var_dump();print '';
(with the added wrinkle of using ob_start then ob_contents, etc. in some incarnations) to an open-source project called Krumo that reminds me of that Javascript-based unobtrusive thing I journalled about a while back (i.e. http://defproc.co.uk/dpDebug2/)

Anyway, check it out for various ideas/tools:
http://us2.php.net/var_dump