I am trying to work on a project that uses Twig Template. Right now, I am learning it and have checked if I can do any alternate for the project as I know how the MVC architecture works. The Twig Template is different as it has file extension html.twig and the following in it:
{% for user in users %}
    <li>{{ user.username | e }}</li>
{% endfor %} 
Now for alternate purpose, I've created a controller and view (Not using Twig rules) in the Template as follows that's very basic:
Controller:
public function index()
{
   //return something
} 
View:
<html>
<head>
   <title>Hello World</title>
</head>
<body>
   <p>This is a sample page.</p>
</body>
</html>
As you can see, I am not using the default architecture for the project (It works) and thinking not to use Twig architecture for the time being. So my question is if I can continue with raw PHP and basic HTML in the Twig Template architecture? Any idea would be appreciated. 
 
     
    