email validation

Where do I remember the informations about the user until he follows the link from the administrators email?

In a database. You store a random code that you append to a link that is sent to the user's provided email address. The link takes them back to your site, match up the code in the database with the code in the url. If it matches "activate" their account in the database. Could be a simple boolean value 0 or 1.

Aero I'm impressed you made sense of that question! :thumbsup:

Yeah props on deciphering that.