We've looked at ways in which CI generates 'views', and how it allows you to create 'mini-views', which you can nest inside other views. This means that you can set up a title page, or a part of your display, once, and then use it over and over again, keeping your display separated from your content.

We've also seen how CI helps you through the chore of writing HTML forms, with a set of helpers that simplify the process and cut down on actual coding.

Lastly, we've looked at CI's validation class, which is a powerful tool for keeping an eye on what your users actually try to enter. Nothing's perfect, but this goes a long way towards stopping users form entering rubbish, or trying to exploit security holes in your site. It also looks much more professional when your site politely but firmly catches out user mistakes, rather than silently accepting meaningless entries.

On the way, we've also looked at the MVC process again, and made a choice between the strict application of MVC principles...