$txt = 216.73.216.163;

geoplugin

$url = "http://www.geoplugin.net/php.gp?ip=".getIP();

$ary = unserialize(load_url($url));

ip所在縣市

($ary['geoplugin_regionName'] == "")?$ary['geoplugin_countryName']:$ary['geoplugin_regionName']

ip-api

$url = "http://ip-api.com/json/".getIP();
$json = load_url($url);
$ary = json_decode($json);