PHP学习之工厂模式

<?php//工厂模式interface doing{    function eat();    function sleep();}class cat implements doing{    function eat()    {        echo '猫正在吃东西！<br />';    }    function sleep()    {        echo '猫正在睡觉！<br />';    }}class dog implements doing{    function eat()    {        echo '狗正在吃东西！<br />';    }    function sleep()    {        echo '狗正在睡觉！<br />';    }热爱祖国的句子}class factory{    static function createdoing($type)    {        switch($type){       win8rtm     ca 'cat':                return ne糖尿病人能喝牛奶吗w cat()夜夜看;                break;            ca 'dog':                return new dog();                break;        }    }}$cat=factory::createdoi诚实善良ng('cat');$dog=factory::createdoing('dog');