Integer size limitations

Please copy me on responses. TIA. I am trying to do some IP address arithmetic using php, but am running into problems because the biggest number that php can handle is 32 bits signed. No good for IP addresses. Try the following: echo 2473473024 & 127; // gives 0 - correct echo 2473473025 & 127; // gives 0 - incorrect echo 28288 & 127; // gives 0 - correct echo 28289 & 127; // gives 1 - correct What happens is that numbers that are bigger than 31 bits are automagically converted to double, which does not allow binary operations (no error though, just wrong results!!!). Is there anyway to make the number unsigned or a long int as in C? Else, how do I do binary arithmetic for IP addresses? This is using 4.04p1. -- Richard Ellerbrock richarde@eskom.co.za