Thread Starter
Paul
(@come-back-home)
I figured that this wasn’t possible so I made a simple function out of solution 5 suggested on this blogpost:
http://www.bdoran.co.uk/2012/08/28/detecting-and-delivering-images-to-retina-displays/
function get_pixel_ratio() {
$pixelRatio = 1;
if (isset($_COOKIE["pixel_ratio"])) {
$pixelRatio = $_COOKIE["pixel_ratio"];
} else {
?>
<script language="javascript">
writeCookie();
function writeCookie()
{
var pixelRatio = 1;
if (window.devicePixelRatio) {
pixelRatio = window.devicePixelRatio;
}
document.cookie = "pixel_ratio=" + pixelRatio + ";" + document.cookie;
location = '<?= $_SERVER['PHP_SELF'] ?>';
}
</script>
<?php
}
return $pixelRatio;
}
Thread Starter
Paul
(@come-back-home)
Just for future reference, the above function did not work that well because in some cases it reloaded/redirected back to the front page if the cookie wasn’t set.
I used a slightly modified technique presented on this blogpost:
http://oxidedesign.com/detecting-a-retina-display/
So here is the function I’m using now which seems to work fine:
function get_pixel_ratio() {
if ( isset( $_COOKIE['retina'] ) ) {
$pixel_ratio = $_COOKIE['retina'];
} else { ?>
<script type="text/javascript">
var retina = 'retina='+ window.devicePixelRatio +';'+ retina;
document.cookie = retina;
if ( document.cookie.length !== 0 ) { document.location.reload(true); }
</script>
<?php }
return $pixel_ratio;
}
Detecting retina displays is not something we are planning on including with PHP Browser Detection at this time.
