How to check two IPs are in the same subnet?

[nightrider77]

Hello.

I need to ensure that two HTTP requests are from the same subnet (/16).
Couldn't figure out how to check this with your lib :(

My guess was to get rangeFromBoundaries from the first IP and compare it with matches($range) on the second IP. But rangeFromBoundaries second argument requires exact rage specification, I've tried different options, but with no luck...

And were doubts if this method will support ipv6 also...

[mlocati]

This code should solve what you need:

use IPLib\Factory;

$ip1 = '192.168.1.127';
$ip2 = '192.168.0.1';

if (Factory::rangeFromString("{$ip1}/24")->contains(Factory::addressFromString($ip2))) {
    echo "{$ip1} and {$ip2} are in the same /24 subnet";
} else {
    echo "{$ip1} and {$ip2} are NOT in the same /24 subnet";
}

(and yes, it works both for IPv4 and IPv6)