jQuery+PHP+MySQL實現(xiàn)無限級聯(lián)下拉框效果

更新時間：2016年02月19日 16:59:02 投稿：lijiao

這篇文章主要介紹了jQuery+PHP+MySQL實現(xiàn)無限級聯(lián)效果的相關資料，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本文簡單實現(xiàn)jQuery無限級聯(lián)效果，分享給大家供大家參考，具體內容如下
效果圖：

　圖1 僅下拉框

　 圖2 層級提示+下拉框

圖3 存儲數(shù)據(jù)點擊響應

主要包含3個文件：index.html（主頁），wuxianjilian.php（數(shù)據(jù)處理），wuxianjilian.sql（MySQL數(shù)據(jù)文件）
1. index.html

<html>
<head>
 <title>無限級聯(lián)</title>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta http-equiv="Content-Language" content="zh-CN" />
 <script type="text/javascript" src="http://files.cnblogs.com/Zjmainstay/jquery-1.6.2.min.js"></script>
</head>
<body>
<div id="jilianContainer"></div>
<script type="text/javascript">
$(document).ready(function(){
 var getData = function(obj){
  $.ajax({
   url:'wuxianjilian.php',
   type:'POST',
   data:{"pid":obj.val()},
   dataType:'json',
   async:false,
   success:function(data){
    if($(".selection").length){
     $(".selection:gt("+$(obj).index()+")").remove(); //移除后面所有子級下拉菜單
     $(".selection:last").after(data);     //添加子級下拉菜單
    }else {
     $("#jilianContainer").append(data);     //初始加載情況
    }
    //所有下拉響應
    $(".selection").unbind().change(function(){
     getData($(this));
    });
   },
   error:function(msg){
    alert('error');
   }
  });
 }
 
 //Init
 getData($(this));
 
});
</script>

<!-- 數(shù)據(jù)存儲示例，僅提取數(shù)據(jù)，不做操作 -->

<div style="height:100px;display:block;"></div>
<input type="button" value="存儲數(shù)據(jù)" id="save"></input>
<script type="text/javascript">
$(document).ready(function(){
 $("#save").click(function(){
  var data = [];
  $(".selection").each(function(){
   data.push($.trim($(this).val()));
  })
  
  alert(data.join(','));
 });
});
</script>

</body>
</html>

2. wuxianjilian.php

<?php
 header("Content-type: text/html; charset=utf-8"); 

 //數(shù)據(jù)庫連接操作
 $conn = mysql_connect("localhost","Zjmainstay","") or die("Can not connect to database.Fatal error handle by ". __FILE__);
 mysql_select_db("test",$conn);   //數(shù)據(jù)庫名為 test
 mysql_query("SET NAMES utf8",$conn);
 
 //獲取父級id
 $pid = (int)$_POST['pid'];
 
 //查詢子級
 $sql = "SELECT id,text FROM `wuxianjilian` WHERE pid={$pid}";
 $result = mysql_query($sql,$conn);
 
 //組裝子級下拉菜單
 $html = '';
 while($row = mysql_fetch_assoc($result)){
  $html .= '<option value="'.$row['id'].'">'.$row['text'].'</option>';
 }

 if(!empty($html)) $html = '<select class="selection"><option value="">請選擇</option>' . $html . '</select>';
 
 //輸出下拉菜單
 echo json_encode($html);
//End_php

3. wuxianjilian.sql

wuxianjilian.sql
/*
Navicat MySQL Data Transfer

Source Server   : localhost
Source Server Version : 50516
Source Host   : localhost:3306
Source Database  : test

Target Server Type : MYSQL
Target Server Version : 50516
File Encoding   : 65001

Date: 2012-10-24 20:59:09
*/

SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `wuxianjilian`
-- ----------------------------
DROP TABLE IF EXISTS `wuxianjilian`;
CREATE TABLE `wuxianjilian` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `pid` int(11) DEFAULT NULL,
 `text` varchar(32) DEFAULT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of wuxianjilian
-- ----------------------------
INSERT INTO `wuxianjilian` VALUES ('1', '0', 'A0');
INSERT INTO `wuxianjilian` VALUES ('2', '0', 'B0');
INSERT INTO `wuxianjilian` VALUES ('3', '1', 'C1');
INSERT INTO `wuxianjilian` VALUES ('4', '1', 'D1');
INSERT INTO `wuxianjilian` VALUES ('5', '1', 'E1');
INSERT INTO `wuxianjilian` VALUES ('6', '2', 'F2');
INSERT INTO `wuxianjilian` VALUES ('7', '2', 'G2');
INSERT INTO `wuxianjilian` VALUES ('8', '3', 'H3');
INSERT INTO `wuxianjilian` VALUES ('9', '3', 'I3');
INSERT INTO `wuxianjilian` VALUES ('10', '3', 'J3');
INSERT INTO `wuxianjilian` VALUES ('11', '3', 'K3');
INSERT INTO `wuxianjilian` VALUES ('12', '4', 'L4');
INSERT INTO `wuxianjilian` VALUES ('13', '4', 'M4');
INSERT INTO `wuxianjilian` VALUES ('14', '8', 'N8');
INSERT INTO `wuxianjilian` VALUES ('15', '9', 'N9');
INSERT INTO `wuxianjilian` VALUES ('16', '14', 'O14');
INSERT INTO `wuxianjilian` VALUES ('17', '14', 'P14');
INSERT INTO `wuxianjilian` VALUES ('18', '14', 'Q14');
INSERT INTO `wuxianjilian` VALUES ('19', '17', 'R17');
INSERT INTO `wuxianjilian` VALUES ('20', '17', 'S18');
INSERT INTO `wuxianjilian` VALUES ('21', '20', 'T20');

如果大家還想深入學習，可以點擊jquery下拉框效果匯總、JavaScript下拉框效果匯總進行學習。

希望本文所述對大家學習jquery程序設計有所幫助。

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