What are the advantages and disadvantages of deriving classes from existing database classes versus creating separate instances for each class in PHP development?

When deciding whether to derive classes from existing database classes or create separate instances for each class in PHP development, it is important to consider the advantages and disadvantages of each approach. Deriving classes from existing database classes can save time and effort by reusing common functionality and structure. It also helps maintain consistency across different classes and simplifies code maintenance. However, this approach can lead to tightly coupled classes and make it harder to extend or modify individual classes in the future. On the other hand, creating separate instances for each class allows for more flexibility and independence between classes. Each class can have its own unique functionality and structure without being constrained by a common base class. However, this approach can result in code duplication and make it harder to manage and maintain a large number of separate classes. In conclusion, the decision to derive classes from existing database classes or create separate instances should be based on the specific requirements of the project and the trade-offs between code reusability and flexibility.

// Deriving classes from existing database classes
class BaseDatabase {
    protected $connection;

    public function __construct($connection) {
        $this->connection = $connection;
    }

    // Common database operations
}

class User extends BaseDatabase {
    // User-specific functionality
}

// Creating separate instances for each class
class User {
    private $connection;

    public function __construct($connection) {
        $this->connection = $connection;
    }

    // User-specific functionality
}

class Product {
    private $connection;

    public function __construct($connection) {
        $this->connection = $connection;
    }

    // Product-specific functionality
}