| <?php | |
| /** | |
| Copyright 2009 Google Inc. All Rights Reserved. | |
| **/ | |
| // Tracker version. | |
| define("VERSION", "4.4sh"); | |
| define("COOKIE_NAME", "__utmmobile"); | |
| // The path the cookie will be available to, edit this to use a different | |
| // cookie path. | |
| define("COOKIE_PATH", "/"); | |
| // Two years in seconds. | |
| define("COOKIE_USER_PERSISTENCE", 63072000); | |
| // 1x1 transparent GIF | |
| $GIF_DATA = array( | |
| chr(0x47), chr(0x49), chr(0x46), chr(0x38), chr(0x39), chr(0x61), | |
| chr(0x01), chr(0x00), chr(0x01), chr(0x00), chr(0x80), chr(0xff), | |
| chr(0x00), chr(0xff), chr(0xff), chr(0xff), chr(0x00), chr(0x00), | |
| chr(0x00), chr(0x2c), chr(0x00), chr(0x00), chr(0x00), chr(0x00), | |
| chr(0x01), chr(0x00), chr(0x01), chr(0x00), chr(0x00), chr(0x02), | |
| chr(0x02), chr(0x44), chr(0x01), chr(0x00), chr(0x3b) | |
| ); | |
| // The last octect of the IP address is removed to anonymize the user. | |
| function getIP($remoteAddress) { | |
| if (empty($remoteAddress)) { | |
| return ""; | |
| } | |
| // Capture the first three octects of the IP address and replace the forth | |
| // with 0, e.g. 124.455.3.123 becomes 124.455.3.0 | |
| $regex = "/^([^.]+\.[^.]+\.[^.]+\.).*/"; | |
| if (preg_match($regex, $remoteAddress, $matches)) { | |
| return $matches[1] . "0"; | |
| } else { | |
| return ""; | |
| } | |
| } | |
| // Generate a visitor id for this hit. | |
| // If there is a visitor id in the cookie, use that, otherwise | |
| // use the guid if we have one, otherwise use a random number. | |
| function getVisitorId($guid, $account, $userAgent, $cookie) { | |
| // If there is a value in the cookie, don't change it. | |
| if (!empty($cookie)) { | |
| return $cookie; | |
| } | |
| $message = ""; | |
| if (!empty($guid)) { | |
| // Create the visitor id using the guid. | |
| $message = $guid . $account; | |
| } else { | |
| // otherwise this is a new user, create a new random id. | |
| $message = $userAgent . uniqid(getRandomNumber(), true); | |
| } | |
| $md5String = md5($message); | |
| return "0x" . substr($md5String, 0, 16); | |
| } | |
| // Get a random number string. | |
| function getRandomNumber() { | |
| return rand(0, 0x7fffffff); | |
| } | |
| // Writes the bytes of a 1x1 transparent gif into the response. | |
| function writeGifData() { | |
| global $GIF_DATA; | |
| header("Content-Type: image/gif"); | |
| header("Cache-Control: " . | |
| "private, no-cache, no-cache=Set-Cookie, proxy-revalidate"); | |
| header("Pragma: no-cache"); | |
| header("Expires: Wed, 17 Sep 1975 21:32:10 GMT"); | |
| echo join($GIF_DATA); | |
| } | |
| // Make a tracking request to Google Analytics from this server. | |
| // Copies the headers from the original request to the new one. | |
| // If request containg utmdebug parameter, exceptions encountered | |
| // communicating with Google Analytics are thown. | |
| function sendRequestToGoogleAnalytics($utmUrl) { | |
| $options = array( | |
| "http" => array( | |
| "method" => "GET", | |
| "user_agent" => $_SERVER["HTTP_USER_AGENT"], | |
| "header" => ("Accepts-Language: " . $_SERVER["HTTP_ACCEPT_LANGUAGE"])) | |
| ); | |
| if (!empty($_GET["utmdebug"])) { | |
| $data = file_get_contents( | |
| $utmUrl, false, stream_context_create($options)); | |
| } else { | |
| $data = @file_get_contents( | |
| $utmUrl, false, stream_context_create($options)); | |
| } | |
| } | |
| // Track a page view, updates all the cookies and campaign tracker, | |
| // makes a server side request to Google Analytics and writes the transparent | |
| // gif byte data to the response. | |
| function trackPageView() { | |
| $timeStamp = time(); | |
| $domainName = $_SERVER["SERVER_NAME"]; | |
| if (empty($domainName)) { | |
| $domainName = ""; | |
| } | |
| // Get the referrer from the utmr parameter, this is the referrer to the | |
| // page that contains the tracking pixel, not the referrer for tracking | |
| // pixel. | |
| $documentReferer = $_GET["utmr"]; | |
| if (empty($documentReferer) && $documentReferer !== "0") { | |
| $documentReferer = "-"; | |
| } else { | |
| $documentReferer = urldecode($documentReferer); | |
| } | |
| $documentPath = $_GET["utmp"]; | |
| if (empty($documentPath)) { | |
| $documentPath = ""; | |
| } else { | |
| $documentPath = urldecode($documentPath); | |
| } | |
| $account = $_GET["utmac"]; | |
| $userAgent = $_SERVER["HTTP_USER_AGENT"]; | |
| if (empty($userAgent)) { | |
| $userAgent = ""; | |
| } | |
| // Try and get visitor cookie from the request. | |
| $cookie = $_COOKIE[COOKIE_NAME]; | |
| $guidHeader = $_SERVER["HTTP_X_DCMGUID"]; | |
| if (empty($guidHeader)) { | |
| $guidHeader = $_SERVER["HTTP_X_UP_SUBNO"]; | |
| } | |
| if (empty($guidHeader)) { | |
| $guidHeader = $_SERVER["HTTP_X_JPHONE_UID"]; | |
| } | |
| if (empty($guidHeader)) { | |
| $guidHeader = $_SERVER["HTTP_X_EM_UID"]; | |
| } | |
| $visitorId = getVisitorId($guidHeader, $account, $userAgent, $cookie); | |
| // Always try and add the cookie to the response. | |
| setrawcookie( | |
| COOKIE_NAME, | |
| $visitorId, | |
| $timeStamp + COOKIE_USER_PERSISTENCE, | |
| COOKIE_PATH); | |
| $utmGifLocation = "http://www.google-analytics.com/__utm.gif"; | |
| // Construct the gif hit url. | |
| $utmUrl = $utmGifLocation . "?" . | |
| "utmwv=" . VERSION . | |
| "&utmn=" . getRandomNumber() . | |
| "&utmhn=" . urlencode($domainName) . | |
| "&utmr=" . urlencode($documentReferer) . | |
| "&utmp=" . urlencode($documentPath) . | |
| "&utmac=" . $account . | |
| "&utmcc=__utma%3D999.999.999.999.999.1%3B" . | |
| "&utmvid=" . $visitorId . | |
| "&utmip=" . getIP($_SERVER["REMOTE_ADDR"]); | |
| sendRequestToGoogleAnalytics($utmUrl); | |
| // If the debug parameter is on, add a header to the response that contains | |
| // the url that was used to contact Google Analytics. | |
| if (!empty($_GET["utmdebug"])) { | |
| header("X-GA-MOBILE-URL:" . $utmUrl); | |
| } | |
| // Finally write the gif data to the response. | |
| writeGifData(); | |
| } | |
| ?><?php | |
| trackPageView(); | |
| ?> | |