Question

thinkphp或php select二级联动

有两个表A和B： A：Aid Aname B：Bid Bname Aid php怎么用js实现select二级联动啊？（表示本人不会js，求详细代码）

Answer 1

12345678910phpfunction ajax_get_b(){ $aid = $_GET['aid']; if( ! $aid ) return false; $res = array();获取二级数据//"select * from table where aid = {$aid}" $str = "<select>"; foreach($res as $v) $str .= "<option>$v['name']</option>"; $str .= "</select>"; }1html+jquery:
<select
id="sa">
<option>a</option>
<option>b</option>
<option>c</option>
<option>d</option>
</select>
<div
id="sb">
</div>
$('#sa').change(function(){
var
url
=
'';
var
aid
=
$(this).val();
$.get(url,{aid:aid},function(str){

$('#sb').html(str);
});
});