Wissen wieviel von meiner seite geladen wurde

<?php

$filePath = isset($_GET['file']) ? "./files/".$_GET['file'] : false;

if (isFile($filePath)) {

// log
$logPath = $filePath.".log";
$counter = file_get_contents($logPath);
$counter = $counter >= 0 ? $counter + 1 : 1;
$fh = fopen($logPath, 'w'); fwrite($fh, $counter); fclose($fh);

// force file download
header('Content-Description: File Transfer');
header('Content-Type: '.mime_content_type($filePath));
header('Content-Disposition: attachment; filename='.basename($filePath));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($filePath));
ob_clean(); flush(); readfile($filePath); exit;

}

?>