How can PHP developers improve code readability and maintainability when generating HTML output within PHP scripts?

To improve code readability and maintainability when generating HTML output within PHP scripts, developers can separate the HTML markup from the PHP logic by using a templating engine like Twig or Blade. This approach allows for cleaner and more organized code, making it easier to make changes to the HTML structure without affecting the PHP logic.

<?php
// Using Twig templating engine
require_once 'vendor/autoload.php';

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

echo $twig->render('index.html', ['title' => 'Homepage', 'content' => 'Welcome to our website']);
?>