How can the EVA principle (Event-View-Action) be applied to PHP development for separating processing logic from HTML output?

Issue: The EVA principle can be applied to PHP development by separating the processing logic from HTML output. This helps in maintaining clean and organized code by keeping the business logic separate from the presentation logic. PHP Code Snippet: ``` <?php // Event $action = isset($_GET['action']) ? $_GET['action'] : 'default'; // View switch ($action) { case 'login': include 'login_form.php'; break; case 'register': include 'register_form.php'; break; default: include 'default_view.php'; } // Action if ($action == 'login') { // Process login form submission // Logic to handle login } elseif ($action == 'register') { // Process register form submission // Logic to handle registration } ?> ```