What are some best practices for separating PHP logic from HTML code in web development projects?

One best practice for separating PHP logic from HTML code in web development projects is to use a template engine like Twig or Blade. These template engines allow you to write clean, readable templates that are separate from your PHP logic, making it easier to maintain and update your code.

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

$data = [
    'name' => 'John Doe',
    'age' => 30
];

echo $twig->render('index.html', $data);