How To Install and Get Started with Twig on a VPS
If a PHP file becomes more complex (and it will for any application), you will have a big problem with managing the layout of your site. If you want a designer to work with it, this designer will have to search into this file which is what we want to prevent. So the solution is the separation of the presentation (layout) from the logic (programming) and the best way to do it is by using a template engine such as Twig.