tp3.2 引用赋值

public function index(){
        
        $user = D('User');
        //整理用户查询数据
        $keyword = $_POST['keyword'];
        $ftype = $_POST['ftype'];
        if(!empty($keyword)&&!empty($ftype)){
            $where[$ftype] = array('like','%'.$keyword.'%');
             $_SESSION['keyword'] = $where;
         }else{
             if(empty($keyword)&&!empty($ftype)){
                 unset($_SESSION['keyword']);
             }else{
                 $where = $_SESSION['keyword'];
             }
         }
        ///数据分页
        $count = $user->where($where)->count();     
        $page = new Page($count,4);
        $page->rollPage = 7;// 分页栏每页显示的页数
        $page->lastSuffix = false;
        //$page->setConfig('header', '共 %TOTAL_ROW% 条记录');
        ///15页 以上 它才出现首页
        $page->setConfig('first', '首页');
        $page->setConfig('prev', '上一页');
        $page->setConfig('next', '下一页');
        $page->setConfig('last', '尾页');
        $page->setConfig('theme', '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END%  共%TOTAL_ROW% 条数据  共%TOTAL_PAGE%页');
        $show = $page->show();
        $this->assign('show',$show);
        ////根据分页信息提取数据
        $list = $user->order('id')->where($where)->limit($page->firstRow,$page->listRows)->select();
        ///取得所有分组
        $role = M('Role');
        $rlist = $role->getField('id,name');
        ////循环遍历用户
        ///神奇的 引用赋值 屌屌屌
        foreach($list as &$user){
            $roleuser = D('RoleUser');
            $data = $roleuser->where('user_id='.$user['id'])->find();
         ///////把分组名称提取存入用户数据
            $user['group'] =$rlist[ $data['role_id']];
        }
        $this->assign('ulist',$list);
        
        $this->display();
    }