要望：Google Analyticsの携帯対応(PHP版)

<?php
  // Copyright 2009 Google Inc. All Rights Reserved.
  $GA_ACCOUNT = "MO-000000-0";
  $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 str_replace("&", "&amp;", $url);
  }
?>

<?php
  $googleAnalyticsImageUrl = googleAnalyticsGetImageUrl();
  echo '<img src="' . $googleAnalyticsImageUrl . '" />';?>