member url creator for mailman

I have a community discussion club. Each member receives a welcome that contains a dynamic link to their subscription management. Basically, all it is is the domain of the listserver, with their email address appended to that, but with the at sign replaced by a couple of symbols. Problem is, people don't even think to read that, least of all save it. I would like to have a php page that asks members to input their email address, and then generates a complete link to their account login page. That should be pretty simple for you php programmers. Thanks ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform php, unix/linux