(REPOST) What"s wrong with this code?

(REPOST) What"s wrong with this code?

am 11.04.2008 09:05:39 von Ronald Raygun

$cssfile =
(stristr($_SERVER['HTTP_USER_AGENT','msie'))?'ie.css':'ff.cs s';
echo
"


This is a test

Hello world!

"
?>


The result in the browser is still:

Hello world! " ?>

- am I missing something?