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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