Re: IP address enconding
| From: | Don Read | Date: | Thu, 19 Apr 2001 19:00:27 +0000 |
| Subject: | Re: IP address enconding | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-49398@lists.php.net to get a copy of this message | ||
On 19-Apr-01 elias wrote:
> No! I can encode IP address to an Integer:
> 192.168.0.1 consider as: a.b.c.d
> and now the formula goes:
> a shl 24 + b shl 16 + c shl 8 + d
>
> but i was looking for something ready made....
>
PHP3 (returns a float, not an integer):
function inet_aton($a) {
$inet = 0.0;
$t = explode(".", $a);
for ($i = 0; $i < 4; $i++) {
$inet *= 256.0;
$inet += $t[$i];
};
return $inet;
}
function inet_ntoa($n) {
$t=array(0,0,0,0);
$msk = 16777216.0;
$n += 0.0;
if ($n < 1)
return(' ');
for ($i = 0; $i < 4; $i++) {
$k = (int) ($n / $msk);
$n -= $msk * $k;
$t[$i]= $k;
$msk /=256.0;
};
$a=join('.', $t);
return($a);
}
Regards,
--
Don Read dread@texas.net
-- It's always darkest before the dawn. So if you are going to
steal the neighbor's newspaper, that's the time to do it.