// Shopping Cart Routes
$router->get('/cart', function() {
    require_once __DIR__ . '/app/Controllers/CartController.php';
    (new CartController())->index();
});

$router->post('/cart/add/{id}', function($id) {
    require_once __DIR__ . '/app/Controllers/CartController.php';
    (new CartController())->add($id);
});

$router->get('/cart/remove/{id}', function($id) {
    require_once __DIR__ . '/app/Controllers/CartController.php';
    (new CartController())->remove($id);
});

I have updated the **Canvas** for `CartController.php` to include an `update` method, allowing you to change quantities directly from the cart page in the next phase.


http://googleusercontent.com/immersive_entry_chip/1

### Next Actions
1. **Update index.php**: Copy the three new cart routes into your `index.php` file to fix the 404 error.
2. **Update book.php**: Replace your current `book.php` view with the template above to show the "Add to Cart" button.
3. **Create Cart View**: Let me know when you are ready for the `cart.php` HTML view to display the items and total price.