php之策略模式

<?php
/**
 * 设计模式之策略模式
 * User: 小狗蛋儿
 * Date: 2017/11/20
 * Time: 20:44
 *
 * 各个算法之间相互替换，不会影响到使用算法的客户
 */


/**
 * Class Xianjin
 * 现金收费类
 */
abstract class Xianjin{
    abstract function Jine($rmb);
}


class A extends Xianjin{
    public  function Jine($rmb)
    {
        echo "0";
        return $rmb;
    }
}

class B extends  Xianjin{
    public $zhe="0.8";
    public  function Jine($rmb)
    {
        echo "1";
        return $rmb*$this->zhe;
    }
}

class C extends  Xianjin{
    public  $a1=300;
    public  $a2=60;
    public  function  Jine($rmb)
    {
        echo "3";
        $result=$rmb;
        if ($rmb>=$this->a1){
            $result=$rmb-floor($rmb/$this->a1)*$this->a2;
        }
        return $result;
    }
}


class ContentCax{
    public $ceshi;
    public  function __Construct($types){
           switch ($types){
               case "0":
                   $this->ceshi=new A();
                   break;
               case "1":
                   $this->ceshi=new B();
                   break;
               case "2":
                   $this->ceshi=new C();
                   break;
           }
        }



        public  function GetRestult($rmb){
                return $this->ceshi->Jine($rmb);
        }
}

/***
 * 客户类
 */

class ssd{

    public  function  ceshi(){
            $a=new ContentCax("2");
            $a->GetRestult("100");
    }
}

$ssd=new ssd();
$ssd->ceshi();