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Php+mysql using AJAX technology, provincial and municipal 3-level linkage without refreshing menu source

Source: Internet
Author: User
Tags eval
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It's simple.

1. First put<script language= "JavaScript" src= ". /include/js/regions.js "></script>
Add to Header.html page
2. ToRegionss ()function added to/include/tag.php.
3. Create a Web site in the root directoryregions.phpFile
4. Join in the appropriate place of your template{$regionss (People's Republic of China)}Can

Note: The name of the form can be changed according to your needs ...


Test page code:
<meta http-equiv= "Content-type" C/>
<title>php+ajax Dynamic Generation Pull-down Menu </title>
<script language= "JavaScript" src= ". /include/js/regions.js "></script>
<body>
<form name= "Form1" method= "Post" action= "" >
<tr><td>{$regionss (People's Republic of China)}</td></tr>
</form>
</body>

Regionss function Code:
Provincial and municipal 3-level Linkage drop-down menu function Regionss province. City.
function Regionss ($country = "People's Republic of China")
{
Global $db; $i = 1;
$text = "<select id=\" select1\ "name=\" select1\ "onchange=\" startrequest () \ "style=\" width:90px;\ "><option" Value=\ "> Province/City/Autonomous Region </option>\n";

$result = $db->query ("Select Province from". Table_province. " WHERE country= ' $country ' ORDER by Provinceid ');
while ($r = $db->fetch_array ($result))
{
$text. = "<option value=". $r [' Province ']. " > ". $r [' Province ']." </option> ";
$i + +;
}
$text. = "</select>";
$text. = "<select id=\" select2\ "name=\" select2\ "onchange=\" Startrequesta () \ style=\ "Width:90px;\" >< Option value=\ "\" > City/County/district </option></select>\n ";
$text. = "<select id=\" select3\ "name=\" select3\ "style=\" width:90px;\ "><option value=\" \ "> City/County </ Option></select>\n ";
return $text;

}

Code for Regions.js:

var ab = new Array ();
var xmlHttp;
var xmlhttpa;
function Createxmlhttprequest () {
if (window. ActiveXObject) {
XmlHttp = new ActiveXObject ("Microsoft.XMLHTTP");
}
else if (window. XMLHttpRequest) {
XmlHttp = new XMLHttpRequest ();
}
}
function Createxmlhttprequesta () {
if (window. ActiveXObject) {
XMLHTTPA = new ActiveXObject ("Microsoft.XMLHTTP");
}
else if (window. XMLHttpRequest) {
XMLHTTPA = new XMLHttpRequest ();
}
}

function Startrequest () {
Createxmlhttprequest ();
Createxmlhttprequesta ();
Xmlhttp.onreadystatechange = Handlestatechange;
Xmlhttpa.onreadystatechange = Handlestatechangearea;
document.getElementById (' Select2 '). options.length = 0;
document.getElementById (' Select3 '). options.length = 0;
var url = document.form1.select1.value;
var qurl = "/regions.php?province=" +url+ "&time=" +new Date (). GetTime ();
Xmlhttp.open ("Get", Qurl, True);
Xmlhttp.send (NULL);
SetTimeout ("Startrequest ()", 2000);
}

function Handlestatechange () {
if (xmlhttp.readystate = = 4) {
if (Xmlhttp.status = = 200) {
var obj = document.getElementById (' Select2 '); Writes the string returned by the server to the page with an ID select2 area
Obja = document.getElementById (' select3 '); Writes the string returned by the server to the page with an ID select3 area
eval (xmlhttp.responsetext);

}
}
}
function Handlestatechangearea () {
eval (xmlhttpa.responsetext);
}
var ab = new Array ();

function Startrequesta () {
Createxmlhttprequesta ();
Xmlhttpa.onreadystatechange = Handlestatechangea;
document.getElementById (' Select3 '). options.length = 0;
var url = document.form1.select2.value;
var qurl = "/regions.php?city=" +url+ "&time=" +new Date (). GetTime ();
Xmlhttpa.open ("Get", Qurl, True);
Xmlhttpa.send (NULL);
SetTimeout ("Startrequest ()", 2000);
}

function Handlestatechangea () {
if (xmlhttpa.readystate = = 4) {
if (Xmlhttpa.status = = 200) {
var obja = document.getElementById (' select3 ');
eval (xmlhttpa.responsetext);
Writes the string returned by the server to the page with an ID select3 area

}
}
}

Data Island regions.php page code

<?php
Require "common.php";
$city = $city? $city: "";
$area = $area? $area: "";
if ($province && $city = = ") {
Global $db; $i = 1;

$result = $db->query ("Select DISTINCT City from". Table_city. " WHERE province= ' $province ' ORDER by Cityid ');
while ($r = $db->fetch_array ($result))
{
$r [City]=iconv (' gb2312 ', ' UTF-8 ', $r [city]);
echo "obj.options[obj.options.length] = new Option ('". $r [City]. "', '". $r [City]. n ";
$i + +;
}
$resultarea = $db->query ("Select DISTINCT City from". Table_city. " WHERE province= ' $province ' ORDER by Cityid ');
$r = $db->fetch_array ($resultarea);
$city = $r [City];
$resulta = $db->query ("Select DISTINCT area from". Table_city. " WHERE city= ' $city ' ORDER by Cityid ');
while ($ra = $db->fetch_array ($resulta))
{
$ra [Area]=iconv (' gb2312 ', ' UTF-8 ', $ra [area]);
echo "obja.options[obja.options.length] = new Option ('". $ra [Area]. "', '". $ra [Area]. n ";
$i + +;
}


}
if ($city && $province = = ") {
Global $db; $i = 1;

$result = $db->query ("Select DISTINCT area from". Table_city. " WHERE city= ' $city ' ORDER by Cityid ');
while ($r = $db->fetch_array ($result))
{
$r [Area]=iconv (' gb2312 ', ' UTF-8 ', $r [area]);
echo "obja.options[obja.options.length] = new Option ('". $r [Area]. "', '". $r [Area]. n ";
$i + +;
}
}
?>

Address Information Database:

With the database in phpcms3.0, I didn't make any changes.

This program can be used directly in the phpcms3.0, if used elsewhere please modify

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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