I would like to send co-registration subscribers a confirmation email that has a link in it. I would like to add all of their subscription information in the link as parameter values and when clicked it will http post the data to a webform, removing the necessity to prepopulate a form or have the user retype type the data in a form. Does anyone know how or if this is possible?
The easiest way is to use http Get not Post. So send them a link like: www.yoursite.com/reg.php?name=bob&email=test@test.com... Like that. Then in reg.php just reference $_GET['name'] and $_GET['email'] etc. Does that answer your question
it is better to use a key other than simply the username and email as this is fairly guessable. Either encrypt one part or the other or if your db assigns a GUID to a user then use this