public static function addGoogleAnalyticsId($id)
{
static $i;
if (!isset($i)) {
$i = 0;
}
$i++;
$name = 'wmbp' . $i;
$ga_script = <<<EOF
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', '{$id}', 'auto', {'name': '{$name}'});
ga('{$name}.send', 'pageview');
</script>
EOF;
// Appends to main page / iframe container.
RedirectWhenBlockedFull::appendToHtmlBody($ga_script);
// Appends to iframed content.
self::appendToHtmlBody($ga_script);
}
