note 11971 added to function.setcookie.php

Would it be possible for one to bypass the WWW-Authenticate Response from the server by setting a cookie on the clients machine containing the PHP_AUTH_TYPE, PHP_AUTH_USER and PHP_AUTH_PW vars? Thus allowing one to retrieve the UserID and password from the client using a normal html form, then redirecting them to the secure area/page without that annoying pop-up box??? Any Suggestions? http://www.php.net/manual/en/function.setcookie.php