User email activation

What is the best way, or indeed what is the best language to use, to, when a user fills out a form, an email is sent to them with an activation link they must click before they can log in.

Like what most forums use when you register.

Cheers

I really don't know much but I think you may be looking at php. I think they have a send email function.
Here
Here
The second one sends the form information to your email.

i would create a random code, put it on the database next to the user, email that code to the email address like: www.whatever.com/activate.php?code="12ssde2" and when user clicks on the link, the page changes the code in the db to "something like done, y, or whatever" to indicate user has been activated...

on th elogin page, u also need to check if user has been activated or not..