In what ways can the structure of PHP scripts be optimized to ensure seamless integration with HTML templates?

To ensure seamless integration between PHP scripts and HTML templates, it is important to separate the logic from the presentation. This can be achieved by using a templating engine like Twig or Smarty, which allows for cleaner and more maintainable code. Additionally, utilizing include files for reusable components can help streamline the structure of PHP scripts and make it easier to update the HTML templates.

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

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

$template = $twig->load('index.html');
echo $template->render(['variable' => 'value']);

// Using include files for reusable components
include 'header.php';
// HTML content here
include 'footer.php';
?>