How can the use of external libraries like Twig or Mustache improve the efficiency and maintainability of Views in PHP applications following the MVC pattern?

Using external libraries like Twig or Mustache can improve the efficiency and maintainability of Views in PHP applications following the MVC pattern by providing a clean separation of concerns between the presentation logic and the application logic. These templating engines offer a more intuitive syntax for creating views, making it easier to maintain and update the presentation layer without affecting the underlying application logic.

// Example using Twig templating engine
require_once 'vendor/autoload.php';

$loader = new \Twig\Loader\FilesystemLoader('path/to/templates');
$twig = new \Twig\Environment($loader);

echo $twig->render('index.html', ['name' => 'John Doe']);