PHP设计模式备忘录模式

<!--?php
/**
 * Created by PhpStorm.
 * User: Jang
 * Date: 2015/6/10
 * Time: 9:49
 */

//游戏角色
class GameRole
{
    #region 游戏角色状态属性（生命力、攻击力、防御力）
    public $liveLevel;

    public $attackLevel;

    public $defenseLevel;
    #endregion

    //保存状态
    public function SaveState()
    {
        return (new RoleStateMemento($this--->liveLevel,$this->attackLevel,$this->defenseLevel));
    }

    //恢复状态
    public function RecoveryState(RoleStateMemento $_memento)
    {
        $this->liveLevel = $_memento->liveLevel;
        $this->attackLevel = $_memento->attackLevel;
        $this->defenseLevel = $_memento->defenseLevel;
    }

    //------------其他属性及操作--------------
    //获得初始状态
    public function GetInitState()
    {
        $this->defenseLevel = 100;
        $this->attackLevel = 100;
        $this->liveLevel = 100;
    }

    //状态显示
    public function StateDisplay()
    {
        echo 角色状态：
;
        echo 生命力：{$this->liveLevel}
;
        echo 攻击力：{$this->attackLevel}
;
        echo 防御力：{$this->defenseLevel}
;
    }

    //被攻击
    public function BeenAttack()
    {
        $this->liveLevel -= 9.5;
        if($this->liveLevel<=0)
        {
            $this->liveLevel = 0;
            echo 呃，该角色阵亡了！
;
            echo Game Over!
;
            return;
        }

        $this->attackLevel -= 1.1;
        if($this->attackLevel<=0)
        {
            $this->attackLevel = 0;
        }

        $this->defenseLevel -= 0.5;
        if($this->defenseLevel<=0)
        {
            $this->defenseLevel = 0;
        }
    }
    }

//角色状态存储箱类
class RoleStateMemento
{
    public $liveLevel;
    public $attackLevel;
    public $defenseLevel;

    public function RoleStateMemento($_ll,$_al,$_dl)
    {
        $this->liveLevel=$_ll;
        $this->attackLevel=$_al;
        $this->defenseLevel=$_dl;
    }
}

//游戏角色状态管理者类
class RoleStateManager
{
    public $memento;
}

<!--?php
/**
 * Created by PhpStorm.
 * User: Jang
 * Date: 2015/6/10
 * Time: 10:02
 */

header(Content-Type:text/html;charset=utf-8);
//-------------------------备忘录模式------------------------
require_once ./Memento/Memento.php;

//开战前
$ufo = new GameRole();
$ufo--->GetInitState();
echo <span style="'color:#ff0000'">----------------开战前-----------------</span>
;
$ufo->StateDisplay();

//保存进度
$roleMan = new RoleStateManager();
$roleMan->memento = $ufo->SaveState();

echo <span style="'color:#ff0000'">----------------战斗中-----------------</span>
;
$num=1;
//大战Boss5个回合
for ($i = 0; $i <13;$i++ )
{
    echo -------------第{$num}回合-------------
;
    $ufo->BeenAttack();
    $ufo->StateDisplay();
    $num++;
    //角色阵亡
    if($ufo->liveLevel<=0)
    {
        break;
    }
}

echo <span style="'color:#ff0000'">----------------恢复状态-----------------</span>
;
//恢复之前状态
$ufo->RecoveryState($roleMan->memento);
$ufo->StateDisplay();