How does the Application Cache in HTML5 impact PHP development and caching strategies?

The Application Cache in HTML5 allows web applications to store resources locally, reducing the need to fetch them from the server repeatedly. This can impact PHP development by reducing server load and improving performance. To take advantage of this feature, PHP developers can set appropriate cache headers for resources that are being cached by the Application Cache.

// Set cache headers for resources that will be cached by the Application Cache
header('Cache-Control: max-age=3600'); // Cache resources for 1 hour
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + 3600) . ' GMT');