Unsigned int to signed in php

Question

It appears, that in 32bit OS ip2long returns signed int, and in 64bit OS unsigned int is returned.

My application is working on 10 servers, and some are

Answer 1

Fwiw, if you're using MySQL it's usually a lot easier and cleaner if you just pass in the IPs as strings to the database, and let MySQL do the conversion using INET_ATON() (when INSERTing/UPDAT(E)'ing) and INET_NTOA() (when SELECTing). MySQL does not have any of the problems described here.

Examples:

SELECT INET_NTOA(ip_column) FROM t;

INSERT INTO t (ip_column) VALUES (INET_ATON('10.0.0.1'));

The queries are also much more readable.

Note that you can not mix INET_NTOA()/INET_ATON() in MySQL with ip2long()/long2ip() in PHP, since MySQL uses an INT UNSIGNED datatype, while PHP uses a signed integer. Mixing signed and unsigned integers will seriously mess up your data!