thinkphp数据的查询和截取

    public function NewsList(){
        $this->assign('title','news');
        $p = I('page',1);
        $listRows = 6;
        $News = M('news');
        $info = $News->field('id,title,subtitle,publish_date,img,detail,typename')->where(array('type'=>'news','status'=>'1'))->order('flag desc,sort_no desc')->page($p,$listRows)->select();
        if(!empty($info)){
            foreach($info as $k=>$v){
                $info[$k]['detail']=mb_substr($v['detail'],0,130,'utf-8');
            }
        }
        $this->assign('news',$info);
        $count = $News->where(array('type'=>'news','status'=>'1'))->count();
        $Page = new Page($count,$listRows);
        $show = $Page->show();
        $this->assign('page',$show);
        $this->display();
    }    public function NewsList(){
        $th