How to contribute to PHP?

Hello, I would like to contribute to the PHP project. In my own work I use PHP 4.0.6 and I already made some improvements which I would like to share with the whole php user community. The log of my changes follows: - HTML-output of phpinfo corrected (missing tags added); - Apache-specific function getrequest(); added to PHP ( the same style as getallheaders()) for debugging purposes - getting rid of annoying session_destroy behavior which requires session_start to be called before session_destroy on the same page in order to destroy a session. session_destroy destroys also the session_cookie now. - as for now session variables are available in $HTTP_SESSION_VARS only after they have been read from the storage medium on the next page (not on the page where they have been registered) . More intutive behavior is to make them also available just after being registered with session_register. And it works. Sincerly, German Shegalov