Problem with Authorization

[cwspen]

I'm trying to get Authentication working.

This is my code:

if (!isset($PHP_AUTH_USER)) {
header('WWW-Authenticate: Basic realm="My Private Stuff"');
header('HTTP/1.0 401 Unauthorized');
echo 'Authorization Required.';
exit;
}

The webpage however gives me a 500/Internal error.

This is the excerpt from the server logs:

malformed header from script. Bad header=HTTP/1.0 401 Unauthorized: c:/path_to_php/php.exe

Any thoughts? My guess is that I have to re-configure something in my Apache config file, but what?

Thanks!

[Anon]

Yeah I just used that code on my site and it works just fine. I am running php 4.0 +

[cwspen]

Any thoughts on what to change in my apache config?

I'm running php 4.1.1