Description:
------------
The HTML basic authentication support has stopped working for me after upgrading to PHP5. I'm using Apache 1.3.31 and PHP5.0.0; the *exact* same setup but with PHP4.3.7 works fine. The only change to my php.ini file is changing the include/extensions directory and loading the mysql extensions, which does not seem to be related to the problem.

To reproduce the bug, one may use the first sample script at http://www.php.net/manual/en/features.http-auth.php. You will be asked time and again for your username and password, no matter what you enter.

A little investigation using phpinfo() shows that the $_SERVER['PHP_AUTH_USER'] and $_SERVER['AUTH_TYPE'] are not set. $_SERVER['PHP_AUTH_PW'] is correctly set, however.

Reproduce code:
---------------
example at http://www.php.net/manual/en/features.http-auth.php

<?php
  if (!isset($_SERVER['PHP_AUTH_USER'])) {
   header('WWW-Authenticate: Basic realm="My Realm"');
   header('HTTP/1.0 401 Unauthorized');
   echo 'Text to send if user hits Cancel button';
   exit;
  } else {
   echo "<p>Hello {$_SERVER['PHP_AUTH_USER']}.</p>";
   echo "<p>You entered {$_SERVER['PHP_AUTH_PW']} as your password.</p>";
  }
?> 

Expected result:
----------------
After entering username and password, they are displayed.

Actual result:
--------------
The code keeps asking for username/password time and again. $_SERVER['PHP_AUTH_USER'] is not set.