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<select name="tra_num">
??????? <option value="" {$num_tra=="%"?'selected':''}>全部</option>
??????? {volist name="list_tra" id="arr_tra" empty="沒有文章"}
??????? <option value="{$arr_tra.id}" { {$num_tra} == {$arr_tra.id} ?'selected':''}>{$arr_tra.id}</option>
??????? {/volist}
????? </select>

這樣寫雙花括號無效? 從調(diào)試程序中看是以下狀況

<select name="tra_num">
??????? <option value="" >全部</option>
??????????????? <option value="1" { (7 == 1 ?'selected':'')}>1</option>
??????????????? <option value="2" { (7 == 2 ?'selected':'')}>2</option>
??????????????? <option value="4" { (7 == 4 ?'selected':'')}>4</option>
??????????????? <option value="5" { (7 == 5 ?'selected':'')}>5</option>
??????????????? <option value="6" { (7 == 6 ?'selected':'')}>6</option>
??????????????? <option value="7" { (7 == 7 ?'selected':'')}>7</option>
????????????? </select>
??? </div>