策略模式

策略模式

<?php 
    //定义策略接口
    interface Strategy{
        public function getTrafic();
    }
    
    //选择策略接口
    
    //行走
    class stepStrategy implements Strategy{
        public function getTrafic(){
            echo "i go step by step";
        }
    }
    
    //自行车
    class bikeStrategy implements Strategy{
        public function getTrafic(){
            echo "use bike trafic to somewhere";
        }
    }
    
    //公共汽车
    class busStrategy implements Strategy{
        public function getTrafic(){
            echo "why not use buses";
        }
    }
    
    
    //客户端交通
    class Trafic{
        public function useTrafic($obj){
            return $obj->getTrafic();
        }
    }
    
    $trafics = new Trafic();
    $trafics->useTrafic(new bikeStrategy());


?>