Am 20.09.2012 18:17, schrieb Maciek Sokolewicz:
On 20-09-2012 18:03, Jim Lucas wrote:
On 09/20/2012 02:35 AM, Sebastian Krebs wrote:
Plaseplease update... 5.1.6 is from 2006! I read the "it's required",
but I can't imagine _anything_ that it's worth it to use such an
extremely outdated, unsupported and therefore insecure and inefficient
version... You know: There are 3 (!) new minor versions available right
now (5.2, 5.3 and 5.4).

However: Regarding your concrete problem I guess you can use ip2long()

if (ip2long($ip)) {

I would suggest a modification to this.

if ( ip2long($ip) !== false ) {

I would actually suggest using inet_pton() instead of ip2long, since it
can also handle IPv6 adresses, not only v4 which people here seem to
think are the only ones in use on this planet. And I agree with Jim that
you really should use a strict equality check in this case.

IPv6 is a valid point, but inet_pton() triggers a warning in case of invalid addresses, which makes it quite useless for validation in my eyes. Also it's not available on windows before 5.3 And the strict comparison feels ... a little bit to much. Of course depending on the use-case, I would treat as invalid too.

- Tul

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