<?php
  //  Copyright 2009 Google Inc. All Rights Reserved.
  $GA_ACCOUNT = "ACCOUNT ID GOES HERE";
  $GA_PIXEL = "ga.php";

  function googleAnalyticsGetImageUrl() {
    global $GA_ACCOUNT, $GA_PIXEL;
    $url = "";
    $url .= $GA_PIXEL . "?";
    $url .= "utmac=" . $GA_ACCOUNT;
    $url .= "&utmn=" . rand(0, 0x7fffffff);

    $referer = $_SERVER["HTTP_REFERER"];
    $query = $_SERVER["QUERY_STRING"];
    $path = $_SERVER["REQUEST_URI"];

    if (empty($referer)) {
      $referer = "-";
    }
    $url .= "&utmr=" . urlencode($referer);

    if (!empty($path)) {
      $url .= "&utmp=" . urlencode($path);
    }

    $url .= "&guid=ON";

    return $url;
  }
?>