Hidden easter eggs in PHP

Found an easter egg hidden in PHP. A Web page written in PHP, followed by a string "=phpe9568f36-d428-11d2-a769-00aa001acf42" as a parameter in the back of its URL, is presented with a photo of a puppy.

Depending on the version of PHP, the picture may be a rabbit or something.

Interested can try, the Chinese Linux commune server can also appear, like this:
Http://www.linuxfans.org/?=PHPE9568F36-D428-11d2-A769-00AA001ACF42


PS. The GUID is defined in the ext/standard/info.h of the PHP source code:
#define PHP_EGG_LOGO_GUID "Phpe9568f36-d428-11d2-a769-00aa001acf42"

A similar GUID is also:
Php_logo_guid:phpe9568f34-d428-11d2-a769-00aa001acf42
Zend_logo_guid:phpe9568f35-d428-11d2-a769-00aa001acf42
php_credits_guid:phpb8b5f2a0-3c92-11d3-a3a9-4c7b08c10000 '