Very simple PHP Router

.htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

index.php

<?php

define('VIEW_DIR', __DIR__ . '/views');

require_once __DIR__ . '/router.php';

router.php

<?php

// inspired by: https://www.taniarascia.com/the-simplest-php-router/

/**
 * PHP Router
 */
$uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
$uri = rtrim($uri, '/');

switch ($uri) {
  case '':
  case '/':
      require VIEW_DIR . '/home.php';
      break;

  case '/about':
      require VIEW_DIR . '/about.php';
      break;

  case '/projects':
      require VIEW_DIR . '/projects.php';
      break;

  default:
      http_response_code(404);
      require VIEW_DIR . '/404.php';
      break;
}