Backend Development
PHP Tutorial
How to use PHP to implement the code for three-level linkage effects based on layUI during development
How to use PHP to implement the code for three-level linkage effects based on layUI during development
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(['jquery', 'form'], function() {
$ = layui.jquery;
form = layui.form();
$form = $('form');
$selectProvince=$form.find('select[name=province]');
$selectCity=$form.find('select[name=city]');
$selectArea=$form.find('select[name=area]');
form.on('select(province)', function(data){
var value = data.value;
var d = value.split('_');
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('[data-new=1]').remove();
$selectArea.find('[data-new=1]').remove();
form.render('select');
}
});
form.on('select(city)', function(data){
var value = data.value;
var d = value.split('_');
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('select(area)', function(data){
});
loadProvince();
});
function loadProvince(){
for(var i=0,length=areaData.length;i<length;i++){
$selectProvince.append('<option value="'+ areaData[i].provinceCode + '_' + areaData[i].mallCityList.length + '_' + i + '">'+areaData[i].provinceName+'</option>')
}
form.render('select');
}
function loadCity(citys,areaIndex){
$selectCity.find('[data-new=1]').remove();
$selectArea.find('[data-new=1]').remove();
for(var i=0,length=citys.length;i<length;i++){
$selectCity.append('<option data-new ="1" value="'+ citys[i].cityCode + '_' + citys[i].mallAreaList.length + '_' + i + '_'+areaIndex+'">'+citys[i].cityName+'</option>')
}
form.render('select');
}
function loadArea(areas){
$selectArea.find('[data-new=1]').remove();
$selectArea.find('[data-new=1]').remove();
for(var i=0,length=areas.length;i<length;i++){
$selectArea.append('<option data-new ="1" value="'+ areas[i].areaCode+'">'+areas[i].areaName +'</option>')
}
form.render('select');
}
})()
</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
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!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
Apr 01, 2025 am 07:21 AM
Alipay PHP...
How does session hijacking work and how can you mitigate it in PHP?
Apr 06, 2025 am 12:02 AM
Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
How to debug CLI mode in PHPStorm?
Apr 01, 2025 pm 02:57 PM
How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...
How to automatically set permissions of unixsocket after system restart?
Mar 31, 2025 pm 11:54 PM
How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
How to send a POST request containing JSON data using PHP's cURL library?
Apr 01, 2025 pm 03:12 PM
Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...
