HTTPclient API

Hi folks, I am developing an application which allows employees to access web applications in our private network. My design is to build an application running on a publicly accessible web server which acts like a browser and does GET/POST etc to private network web applications and displays data to the client. I am using a httpclient class I found from wunderlin.net, but it uses a common file for storing cookies and the same cookie is used for connection by different users. Any ideas on doing this application in a better way will be appreciated ? Also I found w3c-libwww api on my Linux box which seems to be a very nice and extensive implementation of HTTP and other protocols. How can this be utilised with PHP ? As far as I know the code needs to changed to make it compatible with ZEND engine or something like that. Correct me if I am wroing. Can this be implemented in future PHP versions as HTTPClient function or w3c-libwww functions ? I want to contribute something like this to the PHP community but lack deep knowledge in C on Unix/Linux and also the ZEND API. Thanks, Bhavin