PHP如何实现工厂模式？

PHP代码实现简单的工厂模式方法

1、定义抽象基类

//家禽类abstract class Fowl{        abstract public function eat();//吃方法}

2、定义子类

//牛类class Cattle extends Fowl{        public function eat()        {                echo "我是牛，我吃草";        }}//鸭类class Duck extends Fowl{        public function eat()        {                echo "我是鸭，我吃鱼";        }}//羊类class Sheep extends Fowl{        public function eat()        {                echo "我是羊，我吃草";        }}

3、工厂类

//工厂类class Factory{        public static function create($fowlName)        {                switch ($fowlName) {                        case 'Cattle':                                return new Cattle();                                break;                        case 'Duck':                                return new Duck();                                break;                        case 'Sheep':                                return new Sheep();                                break;                }        }}

4、客户端

$cattle = Factory::create('Cattle');$cattle->eat();//我是牛，我吃草$duck = Factory::create('Duck');$duck->eat();//我是鸭，我吃鱼$sheep = Factory::create('Sheep');$sheep->eat();//我是羊，我吃草

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