This should work too, and is probably better because of simplicity.

For those wondering, what this code effectively does is compare the network numbers of the $addr and the $base specification by shifting the host bits off the end (with the >> operator). What I was doing was building a range specification, which given the task, is really overkill.

Well put.

In reply to Re^3: Checking IP's with an IP/mask by tadman
in thread Checking IP's with an IP/mask by strredwolf

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