Ternary comparison fails in thinkphp 5.1 template

Question

<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>
    

Answer 1

Chinese {, you should have changed the template tag