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@freekrai
Last active October 4, 2016 21:55
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Detect retina resolution in Google Analytics
<?php
$google_analytics_id = 'UA-YOUR-ANALYTICS-ID';
$domain = preg_replace('/^www\./', '', $_SERVER['SERVER_NAME']);
?>
<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', '<?php echo $google_analytics_id ?>', '<?php echo $domain; ?>');
var pixelRatio = (window.devicePixelRatio >= 1.5) ? "HiDPI" : "1X";
if (window.devicePixelRatio){
ga('set', 'dimension5', pixelRatio );
}
ga('send', 'pageview');
</script>
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