public function cidrConv($net)
    {
        $start = strtok($net, '/');
        $n = 3 - substr_count($net, '.');

        if ($n > 0) {
            for ($i = $n; $i > 0; $i--) {
                $start .= '.0';
            }
        }

        $bits1 = str_pad(decbin(ip2long($start)), 32, '0', 'STR_PAD_LEFT');
        $net = pow(2, (32 - substr(strstr($net, '/'), 1))) - 1;
        $bits2 = str_pad(decbin($net), 32, '0', 'STR_PAD_LEFT');
        $final = '';

        for ($i = 0; $i < 32; $i++) {
            if ($bits1[$i] == $bits2[$i]) {
                $final .= $bits1[$i];
            }
            if ($bits1[$i] == 1 and $bits2[$i] == 0) {
                $final .= $bits1[$i];
            }
            if ($bits1[$i] == 0 and $bits2[$i] == 1) {
                $final .= $bits2[$i];
            }
        }

        return $start . " - " . long2ip(bindec($final));
    }