Good morning,
I am trying to get the subnet mask from a start and end ip in PHP.
Eg;
14.1.32.0 and 14.1.64.0 is 255.255.224.0
But there doesn't seem to be any built in function for this? Everything I have searched refers to CDIR and trying to get all the ips etc so it seems I am trying to go the other way.
Anyone have any ideas?
This should get you what you want:
$ip = "14.1.32.0";
$ip2 = "14.1.64.0";
echo long2ip(ip2long($ip) - ip2long($ip2));
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