php工厂方法模式(factory method pattern)

继续练

<?php
/*
The  factory method pattern deals with the problem of creating objects without
having to specify the exact class of the object that will be created.
*/
interface Product {
    public function getType();
}

interface ProductFactory {
    public function makeProduct();
}

class SimpleProduct implements Product {
    public function getType() {
        return 'SimpleProduct';
    }
}

class SimpleProductFactory implements ProductFactory {
    public function makeProduct() {
        return new SimpleProduct();
    }
}

//Client
$factory = new SimpleProductFactory();
$product = $factory->makeProduct();
echo $product->getType();

?>

输出

SimpleProduct