Re: [PHP] IP address enconding

[Don Read]

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('&nbsp;');
    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                                       [EMAIL PROTECTED]
-- 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.

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