NETTUTS.com has posted the next part in their "CodeIgniter From Scratch" series today adding on more functionality to include the ability to signup for a newsletter about updates to the site.

Continuing on from Day 3, we'll expand our little application into a simple newsletter signup form. This will allow us to taker a closer look at both the email and the form_validation classes. Learn it all in this 30 minute screencast.

The tutorial is all in the screencast, but you can download the code to keep up on your own as well. There's also links to parts one, two and three to get you caught up.