I’m using some sites to detect my site visitor’s country. I mean like this

$ip = $_SERVER['REMOTE_ADDR'];  
$url1 = 'http://api.hostip.info/get_json.php?ip='.$ip;
$url2 = 'http://ip2country.sourceforge.net/ip2c.php?format=JSON&ip='.$ip;

Sometimes sites like sourgeforge taking too much time to load.

So can anyone tell how to limit the http response time.?

if url1 is down or not responded in x seconds then move to url2,url3,etc