create函数用法

public function create(){        $newuser = M('use');               //实例化模型，类似于new一个“use数据库”对象        $newdata['username']=I('user');        $newdata['password']=I('pass');        $newuser->create($newdata);        //创建临时对象，给newuser赋值        $newuser->add();                   //把newuser添加到“use数据库”    }