用PHP代码实现简单的工厂模式

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