if (file_exists($file)) {
    $log_file = str_replace("/", "-", $file) . ".log";
    file_put_contents("logs/$log_file", "$email accessed - $datetime\n", FILE_APPEND);

    $log_file = $email . ".log";
    file_put_contents("user-logs/$log_file", "$file accessed - $datetime\n", FILE_APPEND);

    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    //header('Content-Type: application/pdf');
    header('Content-Disposition: attachment; filename='.basename($file));
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));
  ob_clean();
    flush();

    readfile($file);

    exit;
}