PHP，Jquery，两种Ajax请求

先上图：

Html:

<include file='public:header' />

<div class="mainBt">

<ul>

<li class="li1">分类信息</li>

<li class="li2">信息列表</li>

<li class="li2 li3">编辑</li>

</ul>

</div>

<div class="mainScAdd ">

<div class="tableBox">

<form target="lifecms_frm" action="<{:U('life/edit',array('life_id'=>$detail['life_id']))}>" method="post">

<table bordercolor="#dbdbdb" cellspacing="0" width="100%" border="1px" style=" border-collapse: collapse; margin:0px; vertical-align:middle; background-color:#FFF;">
<tr>

<td class="lfTdBt">分类：</td>

<td class="rgTdBt">

<select name="data[cate_id]" id="jq_cate" class="manageSelect">

<foreach name="channelmeans" item="item" key="key">

<option value="">
<{$item}>
</option>

<foreach name="cates" item="it" key="k">

<eq name="it.channel_id" value="$key">

<option <eq name="detail.cate_id" value="$it.cate_id">selected="selected"</eq> value="
<{$it.cate_id}>">      
<{$it.cate_name}>
</option>

</eq>

</foreach>

</foreach>

</select>

</td>

</tr>

<tr>

<td class="lfTdBt"></td>

<td class="rgTdBt" id="jq_setting">

<table>

<!--<tr>
<td align="right"><{$cate[$select['k']]}></td>
<td>
<select name="data[select1]" class="manageSelect">
<foreach name="attrs" item="item">
<option value="<{$item.attr_id}>" <eq name="detail[$select['k']]" value="$item.attr_id">selected="selected"</eq> ><{$item.attr_name}></option>
</foreach>
</select>
</td>
</tr>-->

<if condition="!empty($cate['select1'])">

<tr>

<td align="right">
<{$cate.select1}>：</td>

<td>

<select id="jq_sid" name="data[select1]" class="manageSelect">

<!-- Json格式这里不用填写，我们js中动态处理赋值 -->
<!-- 这里之所以采取Json是因为Array格式没有下拉条默认为空的选项-->
<!-- Array格式，将下边的foreach注释取消掉即可 -->
<!--<foreach name="attrs" item="item">

<eq name="item.type" value="select1">

<option value="<{$item.attr_id}>" <eq name="detail.select1" value="$item.attr_id">selected="selected"</eq> >
<{$item.attr_name}>
</option>

</eq>

</foreach>-->

</select>

</td>

</tr>

</if>

<if condition="!empty($cate['select2'])">

<tr>

<td align="right">
<{$cate.select2}>：</td>

<td>

<select id="sid" name="data[select2]" class="manageSelect">

<foreach name="attrs" item="item">

<eq name="item.type" value="select2">

<option value="<{$item.attr_id}>" <eq name="detail.select2" value="$item.attr_id">selected="selected"</eq> >
<{$item.attr_name}>
</option>

</eq>

</foreach>

</select>

</td>

</tr>
</if>

</table>

</td>

</tr>

</table>

<div class="smtQr">
<input type="submit" value="确认保存" class="smtQrIpt" />
</div>

</form>

</div>

</div>

<include file='public:footer' />

JS(Jquery+Ajax):

< script >
var ajaxurl = '<{:U("lifecate/ajax",array("cate_id"=>"0000","life_id"=>$detail["life_id"]))}>';
$(document).ready(function() {
$("#jq_cate").change(function() {
if ($(this).val() > 0) {
var link = ajaxurl.replace('0000', $(this).val());
// Array格式
//$.get(link, function(data) {
//
//    $("#jq_setting").html(data);
//
//}, 'html');
// Json格式
$.get(link, function(data) {
$("#jq_sid").html("<option value=''>请选择...</option>");
$.each(data, function(i, item) {
$("#jq_sid").append("<option value='" + item.attr_id + "'>" + item.attr_name + "</option>");
});
}, 'json');
} else {
alert("请选择分类");
}
});
}); < /script>

PHP:

public function ajax($cate_id, $life_id = 0) {
if (!$cate_id = (int)$cate_id) {
$this->error('请选择正确的分类');
}
if (!$detail = D('Lifecate')->find($cate_id)) {
$this->error('请选择正确的分类');
}
$this->assign('cate', $detail);
//返回Json数据格式
$attrs = json_encode(D('Lifecateattr')->order(array('orderby' => 'asc'))->where(array('cate_id' => $cate_id))->select());
exit($attrs);
//返回Array数据格式
//$this->assign('attrs', D('Lifecateattr')->order(array('orderby' => 'asc'))->where(array('cate_id' => $cate_id))->select());
//$this->assign('attrs', $attrrs);
if ($life_id) {
$this->assign('detail', D('Life')->find($life_id));
$this->assign('maps', D('Lifecateattr')->getAttrs($life_id));
}
$this->display();
}