// avoid trails of query strings which aren't relevant for page counting

  function filter_uri() {

    $uri = (!empty($_SERVER["URL"]) ? $this->clean($_SERVER["URL"]) : $this->clean($_SERVER["REQUEST_URI"]));

    $uri = (strstr($uri, "://") ? "/" : $uri);

    $autoparts = explode("/", str_replace("//", "/", $uri));



    if (isset($uri)) unset($uri);

    $uri = "/";



    for ($i = 0, $max = count($autoparts); $i < $max; ++$i) {

      $match = strpos(($trimmed = trim($autoparts[$i])), "?");



      if ($match === 0) break;

      else $trimmed = ($match ? substr($trimmed, 0, $match) : $trimmed);

      if (realpath($trimmed)) {

        $test = explode(".", $trimmed);

        $first = strtolower(trim($test[0]));

        $uri .= (((count($test) === 2) && ($first == "index") || ($first == "default")) ? "" : $trimmed);

        break;

      }

      elseif ($trimmed === "") continue;

      else $uri .= $trimmed."/";

    }

    return $uri;

  }