Roger Libiez wrote:
I wasn't actually referring to the formats the user types in, those will
obviously need to be checked too. I was referring to verifying that what
they entered is in fact a valid address. Take the example Wikipedia uses:
2001:0db8:0000:0000:0000:0000:1428:57ab can be expressed as any of the
following:
2001:0db8:0000:0000:0000:0000:1428:57ab
2001:0db8:0000:0000:0000::1428:57ab
2001:0db8:0:0:0:0:1428:57ab
2001:0db8:0:0::1428:57ab
2001:0db8::1428:57ab
2001:db8::1428:57ab
So if the user actually puts in 2001:0db8:0000:0000:0000:0000:1428:57ab
and we use this to see if it's a valid address:
function is_valid_ip($ip)
{
return( $ip == inet_pton(inet_ntop($ip))) ? true : false;
}
function is_valid_ip($ip) {
if ($ip == inet_pton(inet_ntop($ip))) return true;
$ip = preg_replace(array('/^0+/', '/:0+/'), array('', ':'), $ip);
return ($ip == inet_pton(inet_ntop($ip)));
}
--
Tullio Andreatta
09:f9:11:02:9d:74:e3:5b:d8:41:56:c5:63:56:88:c0
45:5f:e1:04:22:ca:29:c4:93:3f:95:05:2b:79:2a:b2
Disclaimer: "Please treat this email message in a reasonable way, or we
might get angry" ( http://www.goldmark.org/jeff/stupid-disclaimers )
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