接口调用，字符串截取处理。

 public function index(){
        $this->assign('title','index');
        /*平台公告*/
        $curl=new CurlController();
        $data=array(
                'CmdId'=>'NewsList',
                'Token'=>'',
                'PostDetails'=>json_encode(array(
                        'nid'=>'gonggao',
                        'page'=>1,
                        'listRows'=>'5',
                )));
        $re=$curl->SendCurl($data);
        if ($re['RespCode'] === '000'){
            $re=$re['AcctDetails'];
            foreach($re as $key=>$value){
                $re[$key]['publish']=substr($re[$key]['publish'],0,10);
                $re[$key]['name']=mb_substr($re[$key]['name'],0,17,'utf-8');
            }
            //var_dump($re);
            $this->assign('news',$re);
            $this->assign('nid',$nid);
            $this->assign('id',$id);
        }