V for view
The view is the layer that takes care of the… view. In this layer, you find all the templates that render the HTML that the user gets. Although the separation between views and the rest of the application is easy to see, that does not make views an easy part. In fact, you will have to learn a new technology in order to write views properly. Let's get into the details.
Introduction to Twig
In our first attempt at writing views, we mixed up PHP and HTML code. We already know that the logic should not be mixed in the same place as HTML, but that is not the end of the story. When rendering HTML, we need some logic there too. For example, if we want to print a list of books, we need to repeat a certain block of HTML for each book. And since a priori we do not know the number of books to print, the best option would be a foreach loop.
One option that a lot of people take is minimizing the amount of logic that you can include in a view. You could set some rules, such as we should only include...
