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

Home

Backend Development

PHP Tutorial

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

不言

Jul 14, 2018 pm 05:12 PM

Level three linkage

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>

The above is the entire content of this article. I hope it will be helpful to everyone’s learning. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

About the debug_backtrace() function in PHP that prints debugging information at the call location

Let’s talk about framework development Dependency injection, containers and appearance patterns (lower part)

The above is the detailed content of How to use PHP to implement the code for three-level linkage effects based on layUI during development. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

The Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

See all articles