Re: 0.0.0.0 & iplong()
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On 06/04/2012 12:48 PM, Matijn Woudt wrote:
On Mon, Jun 4, 2012 at 8:38 PM, jas<jason.gerfen@xxxxxxxxx> wrote:On 06/04/2012 11:33 AM, Matijn Woudt wrote:On Mon, Jun 4, 2012 at 6:54 PM, jas<jason.gerfen@xxxxxxxxx> wrote:Not sure if this is a bug or not... I have run into an error when performing a conditional using iplong() and the ~ bitwise operator $ip = '0.0.0.0'; $mask = '24'; $end = (ip2long($ip) || (~ip2long($mask))) + 1; PHP Fatal error: Unsupported operand types I even tried to typecast the mask to (int)The error is probably not where you suspect it to be. ip2long will return false for ip2long($mask), because $mask is not a valid IP address. The ~ operator is not supported for false. - MatijnStrange... this works $ip = '10.0.2.0'; $mask = '24'; Anything using 0.0.0.0 fails using the bitmask to calculate valid CIDR ranges.Yes, because with $ip being 0.0.0.0, the result of ip2long($ip) will be zero. Zero evaluates to false when PHP is going to parse the || operator, and because of that, it continues to parse the rest. When the result of ip2long($ip) is greater that zero, in case of some other valid IP, it will evaluate to true and PHP will not even execute the rest after the || because the result will be true anyway. Did you mean to use a single | operator, as a bitwise OR? - Matijn
With any ACL rule using iptables, hosts.allow/hosts.deny, routers where 0.0.0.0/24 is specified (all of the internet ipv4 addresses) this is a valid range using CIDR notation.
It seems like a bug to me -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php