Predefined variables not recognized

[Paul_R]

I am unsuccessful at running the following code which uses predefined variables. In another simple program I am also unable to recognize the $_GET[] variable.
<?
$browser = $SERVER['HTTP_USER_AGENT'] ;
echo "The sniffer says: $browser" ;
?>

I get only the output: "The sniffer says: " (nothing else)
I amusing MS Windows XP Version 2002 Service Pack 2

MSIE 6.0
Apache (version 2.0.55)
PHP version 5.1.4
I am also using a java extension (if that matters)
Using localhost

Any suggestions
Thanks
Paul R

[laserlight]

It should be:

<?php
$browser = $_SERVER['HTTP_USER_AGENT'] ;
echo "The sniffer says: $browser" ;
?>

In another simple program I am also unable to recognize the $_GET[] variable.

Really? Did you make sure to check that the incoming variable exists with [man]isset/man or [man]empty/man before using it?

[Paul_R]

Thanks, the problem is solved. I can now see all of the predefined variables. I'm not really sure what solved the problem. Perhaps there was a hidden character or something of that sort.
I much appreciated your response.
Paul R