Web Form with PHP Script to Submit Form and Save Data to Database

This project requires a web form that will save the user data when the form is submitted, and then enter the data in a form on another website and submit that form. I subscribe to a webinar system called "Netviewer" ([login to view URL]) which does not have a system for collecting webinar visitor information, similar to the system used by GoToMeeting and GoToWebinar. I would like to place a web form on my webiste which will save the user name and email to my database, and then sign or log the user in to a webinar session I am presenting. Variables needed for the user to og in at netviewer are their name and the session ID. I wish to be able to enter the session ID as a "hidden" field in the form so that the user does not have to remember or enter it. It will be nice if you can program the script to return the user to a web page on my site if the session has not started or has already finished.