Ajax realizes three-level linkage (with code)
This time I will bring you ajax to realize three-level linkage (with code). What are the precautions for ajax to realize three-level linkage? . Here is a practical case, let’s take a look.
1. First place a p on a page to facilitate future reference methods
<body> <p id="sanji">//p的id为“sanji” </p>
2.sanji js processing page
$(document).ready(function(){
//向p里面放三个下拉菜单
var str = "<select id='sheng'></select>
<select id='shi'></select>
<select id='qu'></select>";
//给三个下拉列表定义 str 变量
$("#sanji").html(str);
FillSheng();
FillShi();
FillQu();//Sheng Shi Qu的逻辑顺序
$("#sheng").change(function(){
FillShi();
FillQu();
})//给sheng菜单添加点击事件
$("#shi").change(function(){
FillQu();
})//给shi菜单添加点击事件
});//页面加载完成之后过来执行某些代码3. Fill in the sheng method
function FillSheng()
{
var pcode = "";//定义一个变量
$.ajax({
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success:function(data){
var hang = data.split("^");
str +="<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#sheng").html(str);
});
}2.Fill shi method
function FillShi()
{
var pcode = $("#sheng").val();
$.ajax({
async:false,
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success: function(data){
var hang = data.split("|");
var str = "";
for(var i=0;i<hang.length;i++)
{
var lie = hang[i].split("^");
str += "<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#shi").html(str);
}
});
}3.Fill qu method
function FillQu()
{
var pcode = $("#shi").val();
$.ajax({
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success: function(data){
var hang = data.split("|");
var str = "";
for(var i=0;i<hang.length;i++)
{
var lie = hang[i].split("^");
str += "<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#qu").html(str);
}
});
}4.chuli page
<?php
include("DBDA.class.php");
$db = new DBDA();
$pcode = $_POST["pcode"];
$sql = "select * from chinastates where parentareacode='{$pcode}'";
echo $db->StrQuery($sql);I believe you have mastered the method after reading the case in this article, more Please pay attention to other related articles on the php Chinese website!
Recommended reading:
How does ajax make a partial page jump function
ajax.load() method in jQuery How to use
The above is the detailed content of Ajax realizes three-level linkage (with code). 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
What to do if the blue screen code 0x0000001 occurs
Feb 23, 2024 am 08:09 AM
What to do with blue screen code 0x0000001? The blue screen error is a warning mechanism when there is a problem with the computer system or hardware. Code 0x0000001 usually indicates a hardware or driver failure. When users suddenly encounter a blue screen error while using their computer, they may feel panicked and at a loss. Fortunately, most blue screen errors can be troubleshooted and dealt with with a few simple steps. This article will introduce readers to some methods to solve the blue screen error code 0x0000001. First, when encountering a blue screen error, we can try to restart
Resolve code 0xc000007b error
Feb 18, 2024 pm 07:34 PM
Termination Code 0xc000007b While using your computer, you sometimes encounter various problems and error codes. Among them, the termination code is the most disturbing, especially the termination code 0xc000007b. This code indicates that an application cannot start properly, causing inconvenience to the user. First, let’s understand the meaning of termination code 0xc000007b. This code is a Windows operating system error code that usually occurs when a 32-bit application tries to run on a 64-bit operating system. It means it should
GE universal remote codes program on any device
Mar 02, 2024 pm 01:58 PM
If you need to program any device remotely, this article will help you. We will share the top GE universal remote codes for programming any device. What is a GE remote control? GEUniversalRemote is a remote control that can be used to control multiple devices such as smart TVs, LG, Vizio, Sony, Blu-ray, DVD, DVR, Roku, AppleTV, streaming media players and more. GEUniversal remote controls come in various models with different features and functions. GEUniversalRemote can control up to four devices. Top Universal Remote Codes to Program on Any Device GE remotes come with a set of codes that allow them to work with different devices. you may
What does the blue screen code 0x000000d1 represent?
Feb 18, 2024 pm 01:35 PM
What does the 0x000000d1 blue screen code mean? In recent years, with the popularization of computers and the rapid development of the Internet, the stability and security issues of the operating system have become increasingly prominent. A common problem is blue screen errors, code 0x000000d1 is one of them. A blue screen error, or "Blue Screen of Death," is a condition that occurs when a computer experiences a severe system failure. When the system cannot recover from the error, the Windows operating system displays a blue screen with the error code on the screen. These error codes
How to solve the 403 error encountered by jQuery AJAX request
Feb 20, 2024 am 10:07 AM
Title: Methods and code examples to resolve 403 errors in jQuery AJAX requests. The 403 error refers to a request that the server prohibits access to a resource. This error usually occurs because the request lacks permissions or is rejected by the server. When making jQueryAJAX requests, you sometimes encounter this situation. This article will introduce how to solve this problem and provide code examples. Solution: Check permissions: First ensure that the requested URL address is correct and verify that you have sufficient permissions to access the resource.
Zhengtu IPx classic animation 'Journey to the West' The journey to the west is fearless and fearless
Jun 10, 2024 pm 06:15 PM
Journey through the vastness and set foot on the journey to the west! Today, Zhengtu IP officially announced that it will launch a cross-border cooperation with CCTV animation "Journey to the West" to jointly create a cultural feast that combines tradition and innovation! This cooperation not only marks the in-depth cooperation between the two major domestic classic brands, but also demonstrates the unremitting efforts and persistence of the Zhengtu series on the road of promoting Chinese traditional culture. Since its birth, the Zhengtu series has been loved by players for its profound cultural heritage and diversified gameplay. In terms of cultural inheritance, the Zhengtu series has always maintained respect and love for traditional Chinese culture, and skillfully integrated traditional cultural elements into the game, bringing more fun and inspiration to players. The CCTV animation "Journey to the West" is a classic that has accompanied the growth of generations.
How to use Copilot to generate code
Mar 23, 2024 am 10:41 AM
As a programmer, I get excited about tools that simplify the coding experience. With the help of artificial intelligence tools, we can generate demo code and make necessary modifications as per the requirement. The newly introduced Copilot tool in Visual Studio Code allows us to create AI-generated code with natural language chat interactions. By explaining functionality, we can better understand the meaning of existing code. How to use Copilot to generate code? To get started, we first need to get the latest PowerPlatformTools extension. To achieve this, you need to go to the extension page, search for "PowerPlatformTool" and click the Install button
PHP and Ajax: Building an autocomplete suggestion engine
Jun 02, 2024 pm 08:39 PM
Build an autocomplete suggestion engine using PHP and Ajax: Server-side script: handles Ajax requests and returns suggestions (autocomplete.php). Client script: Send Ajax request and display suggestions (autocomplete.js). Practical case: Include script in HTML page and specify search-input element identifier.
