What are some common project ideas for learning CakePHP and PHP frameworks?

One common project idea for learning CakePHP and PHP frameworks is to create a simple blog application. This project will involve setting up database tables for posts and comments, creating models, controllers, and views for displaying and managing blog posts, implementing user authentication and authorization, and utilizing CakePHP's built-in features such as routing, validation, and helpers.

// Example code snippet for creating a simple blog post model in CakePHP

// app/Model/Post.php
class Post extends AppModel {
    public $validate = array(
        'title' => array(
            'rule' => 'notBlank',
            'message' => 'Please enter a title'
        ),
        'body' => array(
            'rule' => 'notBlank',
            'message' => 'Please enter a body'
        )
    );
}
```

Another project idea is to build a basic e-commerce website. This project will involve creating database tables for products, categories, and orders, implementing CRUD operations for managing products and categories, setting up user authentication and authorization for managing orders, and utilizing CakePHP's features for handling payments, shopping carts, and product search functionality.

```php
// Example code snippet for creating a product controller in CakePHP

// app/Controller/ProductsController.php
class ProductsController extends AppController {
    public function index() {
        $this->set('products', $this->Product->find('all'));
    }
    
    public function view($id) {
        $product = $this->Product->findById($id);
        if (!$product) {
            throw new NotFoundException(__('Invalid product'));
        }
        $this->set('product', $product);
    }
    
    public function add() {
        if ($this->request->is('post')) {
            $this->Product->create();
            if ($this->Product->save($this->request->data)) {
                $this->Flash->success(__('The product has been saved.'));
                return $this->redirect(array('action' => 'index'));
            }
            $this->Flash->error(__('Unable to add the product.'));
        }
    }
}