<select name="tra_num">
<option value="" {$num_tra=="%"?'selected':''}>全部</option>
{volist name="list_tra" id="arr_tra" empty="没有文章"}
<option value="{$arr_tra.id}" { {$num_tra} == {$arr_tra.id} ?'selected':''}>{$arr_tra.id}</option>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Chinese {, you should have changed the template tag