login to protected directory by php

[email protected] (Ali Asghar Toraby Parizy) Sat, 14 Aug 2010 02:51:19 +0430

Newsgroups	php.general
Message-ID	<[email protected]>

Hi. I have a protected directory in my host. I have configured .htaccess
successfully and it works prefect.
Now I'm looking for a solution to login and logout by a php script.
In my site I have a login page. In that page I set 'PHP_AUTH_USER' and '
PHP_AUTH_PW'. but when I try to open protected directory, user
authentication dialog appears.
How can I do this? What is my error?

-- 
Ali Asghar Torabi