How can a Factory design pattern be implemented to handle the creation of classes in PHP?

The Factory design pattern can be implemented in PHP to handle the creation of classes by defining a Factory class that contains a method for creating instances of different classes based on a specified parameter. This allows for centralized creation logic and promotes flexibility and scalability in the codebase. 

<?php

// Define an interface for the classes to be created
interface Product {
    public function getName();
}

// Concrete implementation of the Product interface
class ConcreteProductA implements Product {
    public function getName() {
        return "Product A";
    }
}

// Concrete implementation of the Product interface
class ConcreteProductB implements Product {
    public function getName() {
        return "Product B";
    }
}

// Factory class for creating instances of different classes
class ProductFactory {
    public static function createProduct($type) {
        switch ($type) {
            case 'A':
                return new ConcreteProductA();
            case 'B':
                return new ConcreteProductB();
            default:
                throw new Exception("Invalid product type");
        }
    }
}

// Usage of the Factory pattern
$productA = ProductFactory::createProduct('A');
echo $productA->getName(); // Output: Product A

$productB = ProductFactory::createProduct('B');
echo $productB->getName(); // Output: Product B

Keywords

Factory design pattern classes implementation PHP creation.

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