PHP plant

举例说明，以下是一个User类，非常简单：
/**
*     factory pattern 工厂模式
*/
    interface abstracted        
    {
        public function realCreate();
    }
    //女人类
    class Woman
    {
        public function action()
        {
            echo '这是女人';
        }
    }
    //男人类
    class Man
    {
        public function action()
        {
            echo '这是男人';
        }
    }
    //创建女人
    class WomanCreator implements abstracted 
    {
        public $chromosome;//染色体
        public function realCreate(){
            if ($this->chromosome == "xx") 
            {
                return new Woman();
            }
        }
    }
    //创建男人
    class ManCreator implements abstracted 
    {
        public $chromosome;
        public function realCreate(){
            if ($this->chromosome == "xy" || $this->chromosome == "xyy") 
            {
                return new Man();
            }
        }
    }
    //人类工厂
    class PersonFactory
    {
        public function create($what)
        {
            $create = $what."Creator";  //womanCreator
            return  new $create();
        }
    }
    $create = new PersonFactory();
    $instance = $create->create('woman');
    $instance->chromosome = "xx";
    $instance->realCreate()->action();
?>