MS-Tropical/public/index.php

<?php

require '../app/bootstrap.php';

$DM = new DisplayModule();

const PAGES = ['home', 'tandc', 'privacy', 'tictactoe'];

echo render('header');

$page = !empty($_GET['page']) && in_array($_GET['page'], PAGES) ? $_GET['page'] : 'home';

if($page == "home") {
    echo render('slider');
}

echo render($page);

echo render('footer');