Description:
------------
after a browser sends the username and pass using a simple HTTP authentication script php fails to set $_SERVER['PHP_AUTH_USER']  and $_SERVER['PHP_AUTH_PW'] with the password and username

i'm using CGI version of php and apache 1.3.29

this is my configure command

./configure --prefix=/usr/local/php5 --with-zlib --with-bz2 --with-curl --with-curlwrappers --with-gd=/usr/local/gd --with-mysql --enable-ftp --with-mysql-sock --with-ttf --with-freetype-dir --enable-calendar --with-jpeg-dir --with-png-dir --enable-force-cgi-redirect

and i'm using the php.ini-recommended config file with no modifications

the exact code i'm using works in php4.3.6

Reproduce code:
---------------
$username = 'user';
$password = 'pass';
if (!isset($_SERVER['PHP_AUTH_USER'])){
	header('WWW-Authenticate: Basic realm="realm"');
	header('HTTP/1.0 401 Unauthorized');
	echo '401 ERROR';
} elseif ($_SERVER['PHP_AUTH_USER'] != $username || $_SERVER['PHP_AUTH_PW'] != $password){
	header('WWW-Authenticate: Basic realm="realm"');
	header('HTTP/1.0 401 Unauthorized');
	echo '401 ERROR';
	exit();
}
echo 'YOU logged in!!!';

Expected result:
----------------
should tell the browser to authenticate and send the username and pass to php, if its the wrong username and pass tell it to re-authenticate or echo "YOU logged in!!" if the username and pass are correct

Actual result:
--------------
it always tells the browser to re-authenticate because $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] are never set