if (!empty($_SERVER['HTTP_CLIENT_IP']))

{ $ip = $_SERVER['HTTP_CLIENT_IP']; }

elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))

{ $ip = $_SERVER['HTTP_X_FORWARDED_FOR']; }

else { $ip = $_SERVER['REMOTE_ADDR']; }

$IPv4= explode(".",$ip);

echo "Your IP: $ip ";

for the last part, If state ment should be if the IP include 100 or 101, it connected from school else it is NOT connected from school .

I tried preg_match() but it doesn't work. what should I use for this if statement?

?php if (lempty(S_SERVER['HTTP CLIENTIP])) { $ip= $_SERVER('HTTP-CLIENT-IP']; } elseif (lempty($_SERVER('HTTP-X-FORWARDED-FOR'])) { $ip=$_SERVER('HTTP-X-FORWARDED-FOR']; } else { $ip = $_SERVER('REMOTE_ADDR']; } $IPv4= explode(".",$ip); echo " Your IP: ipln