装饰公司php代码

<?php
// 原始接口
interface Coffee {
    public function cost(): float;
}

// 具体组件
class SimpleCoffee implements Coffee {
    public function cost(): float {
        return 1.0;
    }
}

// 装饰器基类
abstract class CoffeeDecorator implements Coffee {
    protected $coffee;

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

    public function cost(): float {
        return $this->coffee->cost();
    }
}

// 具体装饰器A
class MilkDecorator extends CoffeeDecorator {
    public function cost(): float {
        return $this->coffee->cost() + 0.5;
    }
}

// 具体装饰器B
class SugarDecorator extends CoffeeDecorator {
    public function cost(): float {
        return $this->coffee->cost() + 0.2;
    }
}

// 使用装饰器
$simpleCoffee = new SimpleCoffee();
$milkCoffee = new MilkDecorator($simpleCoffee);
$sugarMilkCoffee = new SugarDecorator($milkCoffee);

echo "Cost of simple coffee: " . $simpleCoffee->cost() . "\n";
echo "Cost of milk coffee: " . $milkCoffee->cost() . "\n";
echo "Cost of sugar milk coffee: " . $sugarMilkCoffee->cost() . "\n";
?>