ThinkPHP 模板substr的截取字符串函数

ThinkPHP 模板substr的截取字符串函数
在Common/function.php加上以下代码

/**
** 截取中文字符串
**/
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true){
    if(function_exists("mb_substr")){
        $slice= mb_substr($str, $start, $length, $charset);
    }elseif(function_exists('iconv_substr')) {
        $slice= iconv_substr($str,$start,$length,$charset);
    }else{
        $re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
        $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
        $re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
        $re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
        preg_match_all($re[$charset], $str, $match);
        $slice = join("",array_slice($match[0], $start, $length));
    }
        $fix='';
        if(strlen($slice) < strlen($str)){
            $fix='...';
        }
        return $suffix ? $slice.$fix : $slice;
}

前端页面需要截取字符串时

    {$v.title|msubstr=0,5}

/********************************************案例**************************************************/

    //新闻列表
    public function NewsList(){
        $this->assign('title','news');
        $p = I('page',1);
        $listRows = 10;
        $News = M('news');
        $info = $News->field('id,title,subtitle,publish_date,img,content')->where(array('type'=>'news','status'=>'1'))->order('flag desc,sort_no desc')->page($p,$listRows)->select();
        $this->assign('news',$info);
        $count = $News->where(array('type'=>'news','status'=>'1'))->count();
        $Page = new Page($count,$listRows);
        $show = $Page->show();
        $this->assign('page',$show);
        //var_dump($info);
        $this->display();
    }