Piwik-18.10.2013

********* Content of test.html (residing on my computer; registers a hit when viewed in my browser and image rendered.):
<img src="http://example.com/img.png" alt="img" />


********* Content of test.html (residing on my webhost ~user/public_html/test.html, no hit when surfing there via example.com/test.html, BUT imgage is rendered!):
<!DOCTYPE html>
<html>
<body>

<img src="http://example.com/img.png" alt="img" />

</body>
</html>


********* Content of .htaccess (residing on my webhost ~user/public_html/.htaccess):
# Use PHP 5.3
AddType application/x-httpd-php53 .php

RewriteEngine On
RewriteRule img.png img.php

# comment ....

<IfModule mod_suphp.c>
 suPHP_ConfigPath /home/user
 <Files php.ini>
   order allow,deny
   deny from all
 </Files>
</IfModule>


********* Content of img.php  (residing on my webhost ~user/public_html/img.php):
<?php
    //Set the id of your piwik site here
    $idSite = 1;
    $token_auth = 'secret';

    //Load Piwik Tracker
    require_once 'PiwikTracker.php';

    //Set the URL path to your Piwik Installation
    $t = new PiwikTracker($idSite,'http://example.com/analytics/');

    //Auth to allow for more API functions
    $t->setTokenAuth($token_auth);

    //Set correct IP (Should be users, not the web server issuing the request)
    $t->setIp($_SERVER['REMOTE_ADDR']);

    //Set referrer (if applicable)
    if(isset($_SERVER['HTTP_REFERER']))
       $t->setUrl($_SERVER['HTTP_REFERER']);

    //Do the tracking
    $t->doTrackPageView('Image viewed!');

    //Get image to be returned
    $im = imagecreatefrompng("img.png");

    //For transparency (Alpha blending)
    imagealphablending($im, true);
    imagesavealpha($im, true);

    //Set header
    header('Content-Type: image/png');
    //Output image
    imagepng($im);
    //Unload image
    imagedestroy($im);
?>

********* PiwikTracker.php  (residing on my webhost ~user/public_html/PiwikTracker.php)

********* img.png  (residing on my webhost ~user/public_html/img.png)

********* piwik.php et.al. (residing on my webhost ~user/public_html/analytics/piwik.php)