BASE CONTROLLER
---------------------------------
<?php
    interface RenderInterface {
        public function render(string $template, array $contents = []) : string;
    }

    abstract class Render implements RenderInterface {
        public function render (string $template, array $contents = []) : string {
            return include $template;
        }
    }

CARS CONTROLLER
---------------------------------
<?php
    include 'BaseController.php';
    include 'Models/Cars.php';

    class CarsController extends Render {
        public function carsAction () {
            $listOfCars = [
                'Toyota',
                'Ford',
                'Audi',
                'Nissan',
                'Mercedes',
                'Opel',
                'Tesla',
            ];

            $cars = new Cars($listOfCars);
            $randomCars = $cars->getRandomCars();

            $template = 'Views/cars.view.php';
            $templateVariables = [
                'cars' => $randomCars,
            ];

            return Render::render($template, $templateVariables);
        }
    }