How to use PHP to implement the code for three-level linkage effects based on layUI during development-PHP Tutorial-php.cn

How to use PHP to implement the code for three-level linkage effects based on layUI during development

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Release： 2023-04-03 08:12:02

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This article mainly introduces the code on how to use PHP to realize the three-level linkage effect based on layUI in development. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it

Backend development often uses the layUI framework to make the entire page look beautiful and elegant. However, sometimes some native effects cannot be used on the layUI framework. For example, we recently encountered the select effect of three-level linkage between provinces, cities and counties. Different from the previous ones, in the layUI framework, you need to pay attention to the lay-filter attribute of select to listen for events, and form.render() is needed to re-render. To solve these two problems, linkage is no longer a problem. Let me share it with you below.

Implementation code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<title>基于 Layui form 组件的省市区级联的实现</title>
<link rel="stylesheet" href="http://www.zhengjinfan.cn/plugins/layui/css/layui.css" />
</head>
<body>
<div style="margin: 50px auto; ">
<form class="layui-form">
<div class="layui-form-item">
<label class="layui-form-label">选择地区</label>
<div class="layui-input-inline">
<select name="province" lay-filter="province">
<option value="">请选择省</option>
</select>
</div>
<div class="layui-input-inline" style="display: none;">
<select name="city" lay-filter="city">
<option value="">请选择市</option>
</select>
</div>
<div class="layui-input-inline" style="display: none;">
<select name="area" lay-filter="area">
<option value="">请选择县/区</option>
</select>
</div>
</div>
</form>
</div>
<script type="text/javascript" src="http://www.zhengjinfan.cn/plugins/layui/layui.js"></script>
<script type="text/javascript" src="http://www.zhengjinfan.cn/js/area.js"></script>
<script>
(function(){
var areaData=Area;
var $, $form,form;
var $selectProvince,$selectCity,$selectArea;
layui.use([&#39;jquery&#39;, &#39;form&#39;], function() {
$ = layui.jquery;
form = layui.form();
$form = $(&#39;form&#39;);
$selectProvince=$form.find(&#39;select[name=province]&#39;);
$selectCity=$form.find(&#39;select[name=city]&#39;);
$selectArea=$form.find(&#39;select[name=area]&#39;);
form.on(&#39;select(province)&#39;, function(data){
var value = data.value;
var d = value.split(&#39;_&#39;);
var code = d[0];
var count = d[1];
var index = d[2];
if(count > 0) {
loadCity(areaData[index].mallCityList,index);
$selectCity.parent().show();
} else {
$selectCity.parent().hide();
$selectArea.parent().hide();
$selectCity.find(&#39;[data-new=1]&#39;).remove();
$selectArea.find(&#39;[data-new=1]&#39;).remove();
form.render(&#39;select&#39;);
}
});
form.on(&#39;select(city)&#39;, function(data){
var value = data.value;
var d = value.split(&#39;_&#39;);
var code = d[0];
var count = d[1];
var index = d[2];
var areaIndex=d[3];
if(count > 0) {
loadArea(areaData[index].mallCityList[index].mallAreaList);
$selectArea.parent().show();
} else {
$selectArea.parent().hide();
}
});
form.on(&#39;select(area)&#39;, function(data){
});
loadProvince();
});
function loadProvince(){
for(var i=0,length=areaData.length;i<length;i++){
$selectProvince.append(&#39;<option value="&#39;+ areaData[i].provinceCode + &#39;_&#39; + areaData[i].mallCityList.length + &#39;_&#39; + i + &#39;">&#39;+areaData[i].provinceName+&#39;</option>&#39;)
}
form.render(&#39;select&#39;);
}
function loadCity(citys,areaIndex){
$selectCity.find(&#39;[data-new=1]&#39;).remove();
$selectArea.find(&#39;[data-new=1]&#39;).remove();
for(var i=0,length=citys.length;i<length;i++){
$selectCity.append(&#39;<option data-new ="1" value="&#39;+ citys[i].cityCode + &#39;_&#39; + citys[i].mallAreaList.length + &#39;_&#39; + i + &#39;_&#39;+areaIndex+&#39;">&#39;+citys[i].cityName+&#39;</option>&#39;)
}
form.render(&#39;select&#39;);
}
function loadArea(areas){
$selectArea.find(&#39;[data-new=1]&#39;).remove();
$selectArea.find(&#39;[data-new=1]&#39;).remove();
for(var i=0,length=areas.length;i<length;i++){
$selectArea.append(&#39;<option data-new ="1" value="&#39;+ areas[i].areaCode+&#39;">&#39;+areas[i].areaName +&#39;</option>&#39;)
}
form.render(&#39;select&#39;);
}
})()
</script>
</body>
</html>

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