Why is this not working..its so simple!?

Anon

Using PHP 4.1.2.
Here is my HTTP_USER_AGENT...
Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.0rc1) Gecko/20020417

And here is the code that returns nothing...

<?php

function inAgent($agent) {
$notAgent = (strpos($HTTP_SERVER_VARS["HTTP_USER_AGENT"],$agent) === false);
return !$notAgent;
}

if (inAgent('Mozilla')) {
echo "Mozilla ";
}
?>

Can anyone tell me where I'm screwing up?

skripty

Ever thought that...
if (inAgent('Mozilla'))
.. may return FALSE

metin

Use: $_SERVER["HTTP_USER_AGENT"]

...instead of: $HTTP_SERVER_VARS["HTTP_USER_AGENT"]

Anon

skripty: Why would it return FALSE? My first post showed the reply to the user agent, which is Mozilla. It should be returning TRUE.

Metin: That worked! Can you tell me why? I read that I needed to use $HTTP_SERVER_VARS["HTTP_USER_AGENT"] for the Windows server, so what is different about $_SERVER["HTTP_USER_AGENT"]???

Anon

because $_SERVER is superglobal and $HTTP_SERVER_VARS is not.

metin

because $_SERVER is superglobal and $HTTP_SERVER_VARS is not.
That is not really why! 😉
The change began somewhere in Php 4.1.1, I think.
And one of the reasons is the security!
For more info you could contact the Php people!
If you "run" the phpinfo-function, you will see several new Php variables:

$SERVER, $ENV, $COOKIE, $POST, $GET and $FILES!

Cheers,
Metin