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Out-of-office starter php + mysql uses ajax technology for provincial, municipal, and prefecture-level 3 linkage without refreshing menu source code

Source: Internet
Author: User
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Absolute Originality
Test address: http://www.mlmm.cn/mypage? Name = ceshi

Test Page code:Copy codeThe Code is as follows: <Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>
<Title> php + ajax dynamically generated drop-down menu </title>
<Script language = "JavaScript" src = "../include/js/regions. js"> </script>
</Head>
<Body>
<Form name = "form1" method = "post" action = "">
<Tr> <td >{$ regionss (People's Republic of China)} </td> </tr>
</Form>
</Body>
</Html>

Regionss function code:
QUOTE:Copy codeThe Code is as follows: // provincial/municipal level 3 linkage drop-down menu function regionss provincial/municipal/local
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. = "& nbsp <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 = \" \ "> county/county </option> </select> \ n ";
Return $ text;

}

Regions. js code:

Copy codeThe Code is as follows: // 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'); // write the string returned by the server to the area where the ID is select2 on the page.
Obja = document. getElementById ('select3 '); // write the string returned by the server to the area where the ID is select3 on the page.
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 );
// Write the string returned by the server to the area with ID select3 on the page

}
}
}

Data island regions. php Page code

Copy codeThe Code is as follows: <? 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:

Phpcms3.0 database is used, and I have not made any changes

This program can be used directly in phpcms3.0. If it is used elsewhere, modify it by yourself.

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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