ip获取到城市

<?php
function GetIP() {
    if ($_SERVER["HTTP_X_FORWARDED_FOR"])
        $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
    else if ($_SERVER["HTTP_CLIENT_IP"])
        $ip = $_SERVER["HTTP_CLIENT_IP"];
    else if ($_SERVER["REMOTE_ADDR"])
        $ip = $_SERVER["REMOTE_ADDR"];
    else if (getenv("HTTP_X_FORWARDED_FOR"))
        $ip = getenv("HTTP_X_FORWARDED_FOR");
    else if (getenv("HTTP_CLIENT_IP"))
        $ip = getenv("HTTP_CLIENT_IP");
    else if (getenv("REMOTE_ADDR"))
        $ip = getenv("REMOTE_ADDR");
    else
        $ip = "Unknown";
    return $ip;
}
?>
<?php
echo $ip=GetIP();
//$ip="222.23.43.23";
$url='http://www.ip138.com/ips138.asp?ip='.$ip.'&action=2';
//echo $url;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
//设置URL，可以放入curl_init参数中
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.202 Safari/535.1");
//设置UA
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//将curl_exec()获取的信息以文件流的形式返回，而不是直接输出。 如果不加，即使没有echo,也会自动输出
$content = curl_exec($ch);
//执行
curl_close($ch);
//关闭
//echo $content;
//<li>本站主数据：湖南省常德市 电信</li>
preg_match('/本站主数据：(?<mess>(.*))市(.*)</li><li>/',$content,$arr);
//查询注意事项
if(strripos($arr['mess'],"省")>0)
$city=substr($arr['mess'],strripos($arr['mess'],"省")+2,100);
else
$city=$arr['mess'];
//echo $city;
?>
<!------------调用的城市名称如下------------------->
<div><?php echo $city ?></div>