Js to locate the user's city information based on the IP address

1. Call the Sina IP Address Library

Sina provides open IP address library data for developers to call. Call address:

Http://int.dpool.sina.com.cn/iplookup/iplookup.php, you can return the provincial and municipal information of the current ipip.

<Script type = "text/javascript" src = "js/jquery. js"> </script>
<Script type = "text/javascript" src = "js/jquery. cityselect. js"> </script>
<Script type = "text/javascript" src = "http://int.dpool.sina.com.cn/iplookup/iplookup.php?
Format = js "> </script>
We first load the jquery library and cityselect city drop-down plug-ins, then call Sina's IP address library, and return it in js format, of course, if you want to query the city information of a specified IP address, you can use an interface address such as: http://int.dpool.sina.com.cn/iplookup/iplookup.php? Format = json & ip = 123.123.123.123, replace the parameter ip value with the specified ip address.

Local js call:

Var myprovince = remote_ip_info ['Province '];
Var mycity = remote_ip_info ['city']
Var mydistrict = remote_ip_info ['District '];
$ (Function (){
$ ("# City_1"). citySelect ({
Prov: myprovince,
City: mycity
});
});
The HTML code is:

<H3> call the Sina IP library interface <P> your city is: <script> document. write (myprovince + ''+ mycity); </script> </p>
<Div id = "city_1">
<Select class = "prov"> </select>
<Select class = "city"> </select>
</Div>

2. Call the Taobao IP Address Library

Taobao also provides more authoritative IP Address Library, call address: http://ip.taobao.com/service/getIpInfo.php? Ip address = 123.123.123.123, return the province and city information of the corresponding IP address.

Call method:

$ (Function (){
$. GetJSON ("getTaoIP. php", function (json ){
Var myprovince2 = json. data. region;
Var mycity2 = json. data. city;
$ ("# City_2" ).html ("your city is:" + myprovince2 + mycity2 );
});
});
GetTaoIP. php is used to obtain the province and city information of Taobao's corresponding IP address. The returned data is in json format.

$ Ip = get_client_ip (); // obtain the ip address of the current user
$ Url = "http://ip.taobao.com/service/getIpInfo.php? Ip = ". $ ip;
$ Data = file_get_contents ($ url); // call the Taobao API to obtain information.
Echo $ data;
Get_client_ip () is used to obtain the IP address of a local user.

// Obtain the user's real IP address
Function get_client_ip (){
If (getenv ("HTTP_CLIENT_IP") & strcasecmp (getenv ("HTTP_CLIENT_IP"), "unknown "))
$ Ip = getenv ("HTTP_CLIENT_IP ");
Else if (getenv ("HTTP_X_FORWARDED_FOR") & strcasecmp (getenv ("HTTP_X_FORWARDED_FOR "),
"Unknown "))
$ Ip = getenv ("HTTP_X_FORWARDED_FOR ");
Else if (getenv ("REMOTE_ADDR") & strcasecmp (getenv ("REMOTE_ADDR"), "unknown "))
$ Ip = getenv ("REMOTE_ADDR ");
Else if (isset ($ _ SERVER ['remote _ ADDR ']) & $ _ SERVER ['remote _ ADDR']
& Strcasecmp ($ _ SERVER ['remote _ ADDR '], "unknown "))
$ Ip = $ _ SERVER ['remote _ ADDR '];
Else
$ Ip = "unknown ";
Return ($ ip );
}