php mysql ip地址所在城市查詢代碼-ip資料庫

<?
$servername ='localhost';
$dbname='test';   //資料庫名
$dbusername ='root'; //資料庫使用者名稱
$dbpassword ='root'; //資料庫密碼
 
$link=mysql_connect($servername,$dbusername,$dbpassword);
mysql_select_db($dbname) or die();
mysql_query("set names 'gbk'");

function getip(){
 if($_SERVER['HTTP_X_FORWARDED_FOR']){
  $online_ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
 }elseif($_SERVER['HTTP_CLIENT_IP']){
  $online_ip = $_SERVER['HTTP_CLIENT_IP'];
 }else{
  $online_ip = $_SERVER['REMOTE_ADDR'];
 }
 return $online_ip;
}

function ip2int($ip){

   list($ip1,$ip2,$ip3,$ip4)=explode(".",$ip);

   return $ip1*pow(256,3)+$ip2*pow(256,2)+$ip3*256+$ip4;
}
$ip=ip2int(getip());
$sql="select * from iptocity where IP_Start<='$ip' order by IP_Start desc limit 1";
$q=mysql_query($sql);
$rs=mysql_fetch_array($q);
$sheng=$rs["IP_Province"];
$city=$rs["IP_City"];

echo $sheng."->".$city;

?>

mysql ip庫下載地址
http://g.111cn.net/down/ipdata.rar