thinkphp自定义类

<?php//自定义Modle类namespace Home\Model;use Think\Model;class StuModel extends Model{    public function getInfo(){        echo '这是自定义的Model类';    }    public function getIp(){        echo $_SERVER['REMOTE_ADDR'];    }}----------//使用自定义的Modle类<?phpnamespace Home\Controller;use Think\Controller;class ComController extends Controller{    public function index(){        $model = D('stu');        $model->getInfo();        $model->getIp();    }}