php - Convert a start and end ip range to a net mask -

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good morning,

i trying subnet mask start , end ip in php.

eg; 14.1.32.0 , 14.1.64.0 255.255.224.0

but there doesn't seem built in function this? have searched refers cdir , trying ips etc seems trying go other way.

anyone have ideas?

this should want:

$ip = "14.1.32.0";  $ip2 = "14.1.64.0"; echo long2ip(ip2long($ip) - ip2long($ip2));

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