php设计模式-简单工厂模式

<?php
header('Content-Type:text/html;charset=utf-8');
// 简单工厂模式（静态工厂方法模式）
interface people{
    public function say();
}
// 继承people类
class man implements people{
    public function say(){
        echo "man";
    }
}
class woman implements people{
    public  function say(){
        echo "woman";
    }
}
// 工厂类
class SimpleFactory{
    // 简单工厂里的静态方法-用于创建对象
    static function createMan(){
        return new man();
    }
    static function createWoman(){
        return new woman();
    }
}
// 具体调用
$man = SimpleFactory::createMan();
$man->say();
$woman = SimpleFactory::createWoman();
$woman->say();