程式碼展示
1,案例目錄如下:
#2,所有程式碼展示:
conn.inc.php:
<?php
define("HOST",'localhost');
define("USER",'root');
define("PWD",'root');
define("DBNAME",'php');mysqli.php :
<?php
include 'conn.inc.php';
$mysqli=new mysqli(HOST,USER,PWD,DBNAME);
if($mysqli->connect_errno){
die('数据库链接出错'.$mysqli->connect_error);
}#region.html:
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="./jquery-1.11.0.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
// 加载所有的省份
$.ajax({
type: "get",
url: "region_action.php", // type=1表示查询省份
data: {"parent_id": "1", "type": "1"},
dataType: "json",
success: function(data) {
$("#provinces").html("<option value=''>请选择省份</option>");
$.each(data, function(i, item) {
// alert(item.region_id);
$("#provinces").append("<option value='" + item.region_id + "'>" + item.region_name + "</option>");
});
}
});
$("#provinces").change(function() {
$.ajax({
type: "get",
url: "region_action.php", // type =2表示查询市
data: {"parent_id": $(this).val(), "type": "2"},
dataType: "json",
success: function(data) {
$("#citys").html("<option value=''>请选择市</option>");
$.each(data, function(i, item) {
$("#citys").append("<option value='" + item.region_id + "'>" + item.region_name + "</option>");
});
}
});
});
$("#citys").change(function() {
$.ajax({
type: "get",
url: "region_action.php", // type =2表示查询市
data: {"parent_id": $(this).val(), "type": "3"},
dataType: "json",
success: function(data) {
$("#countys").html("<option value=''>请选择县</option>");
$.each(data, function(i, item) {
$("#countys").append("<option value='" + item.region_id + "'>" + item.region_name + "</option>");
});
}
});
});
//显示地址
$("#countys").change(function() {
var value = $("#provinces").find("option:selected").text()
+ $("#citys").find("option:selected").text()
+ $("#countys").find("option:selected").text();
// alert(value);
$("#region").append("选择的地址是:"+"<input value='" + value + "'>");
});
});
</script>
</head>
<body>
<h1 align="center">PHP+Ajax+Mysql省市县三级联动</h1>
<table align="center" border="1" cellpadding="3" cellspacing="0" width="30%">
<tr bgcolor="skyblue">
<th>省份</th>
<th>市</th>
<th>县</th>
</tr>
<tr style="height: 100px">
<th>
<select id="provinces">
<option value="">请选择省份</option>
</select>
</th>
<th>
<select id="citys">
<option value="">请选择市</option>
</select>
</th>
<th>
<select id="countys">
<option value="">请选择县</option>
</select><br>
</th>
</tr>
</table>
<h4>
<div align="center" id="region"></div></th>
</h4>
</body>
</html><?php
header("Content-Type:text/html;charset=utf-8");
include './mysqli.php';
$type = isset($_GET["type"]) ? $_GET["type"] : "";
$parent_id = isset($_GET["parent_id"]) ? $_GET["parent_id"] : "";
// 链接数据库
if ($type == "" || $parent_id == "") {
exit(json_encode(array("flag" => false, "msg" => "查询类型错误")));
} else {
// 链接数据库
$sql="select *from global_region where parent_id=$parent_id AND region_type=$type";
$result=$mysqli->query($sql);
if($result->num_rows>0)
{
$arr=[];
while ($row=$result->fetch_assoc())
{
$arr[$row["region_id"]]['region_id']=$row["region_id"];//$arr[1]["title"]=$row["title"]
$arr[$row["region_id"]]['region_name']=$row["region_name"];//$arr[1]["content"]=$arr["content"]
}
}
$provinces_json = json_encode($arr);
exit($provinces_json);
}
?>################ 
