Total visitor counter to my existing counter for Wordpress - php

Question

I am making a simple visitor counter without MySQL in a WordPress plugin. To achieve this I make a simple text visitor.db where store visitor ip for a while and show the total number of IPs as current online visitor and after a time period the history log delete. But now I want to implement from that visitor.db to save them another.db where it count total visitor till today. Is it possible?
If I count while loop ? how can I save it to another.db
$counter = 0;
while(..) {
$counter++;
}
echo $counter;
For example now it show Online : 70
But I want to achieve Total : 145875458 Online : 70 something like this
define('VISITOR_DATA_PATH',plugin_dir_path( __FILE__ ));
$dbfile = VISITOR_DATA_PATH . "visitors.db";
$expire = 300; // average time in seconds to consider someone online before removing from the list
if(!file_exists($dbfile)) {
die("Error: Data file " . $dbfile . " NOT FOUND!");
}
if(!is_writable($dbfile)) {
die("Error: Data file " . $dbfile . " is NOT writable! Please CHMOD it to 666!");
}
function getIPs() {
if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
elseif(isset($_SERVER['REMOTE_ADDR'])) $ip = $_SERVER['REMOTE_ADDR'];
else $ip = "0";
return $ip;
}
function CountVisitors() {
global $dbfile, $expire;
$cur_ip = getIPs();
$cur_time = time();
$dbary_new = array();
$dbary = unserialize(file_get_contents($dbfile));
if(is_array($dbary)) {
while(list($user_ip, $user_time) = each($dbary)) {
if(($user_ip != $cur_ip) && (($user_time + $expire) > $cur_time)) {
$dbary_new[$user_ip] = $user_time;
}
}
}
$dbary_new[$cur_ip] = $cur_time; // add record for current user
$fp = fopen($dbfile, "w");
fputs($fp, serialize($dbary_new));
fclose($fp);
$out = sprintf("%3d", count($dbary_new)); // format the result to display 3 digits with leading 0's
return $out;
}
function visitor_counter_shrocode(){
$visitors_online = CountVisitors();
ob_start();
$output='<span> Online: <b>'.$visitors_online.'</b></span>';
ob_end_clean();
return $output;
}
add_shortcode('onlinevisitor','visitor_counter_shrocode');