OK, this is pretty silly and stupid, but add “?=PHPE9568F36-D428-11d2-A769-00AA001ACF42” to the end of any URL that’s a PHP page, and you’ll get a funny little picture of a dog. Try it here. There’s apparently a different dog/animal/creature depending on your version: See here, here or here). Of course, you can disable this in php.ini if you’re on the paranoid side, but it’s still kind of fun (and yes, I know it’s been around for years, but it’s the first I’ve seen it). Link via digg.