Dunno if this has been posted before, but here are some PHP easter eggs:

Adding ?=PHPE9568F36-D428-11d2-A769-00AA001ACF42 after an url for a server that has PHP installed. Example http://albn.neg.be/?=PHPE9568F36-D42...9-00AA001ACF42

Here's another one: http://www.php.com/?=PHPE9568F36-D42...9-00AA001ACF42

And to see PHP credits, simply add ?=PHPB8B5F2A0-3C92-11d3-A3A9-4C7B08C10000
http://www.priorweb.be/?=PHPB8B5F2A0...9-4C7B08C10000