Detecting Smart Phone Screen Orientation in PHP & Javascript

DaveC asked the question about orientation

So I thought I’d drop a quick note on the code :

<?php
if( isset($_COOKIE['orientation']) ){
	$rotation = $_COOKIE['orientation'];
	if( $rotation == 0 ){
		echo '<h1>Is Portrait</h1>';
 	}else{
		echo '<h1>Is Landscape</h1>';
	}
 }else{
?>
	<script type="text/javascript" language="javascript">
		function writeCookie(){
			the_cookie = document.cookie;
			var orientation = 0;
			if( window.orientation ){
				orientation = window.orientation;
			}
			the_cookie = 'orientation='+window.orientation+';'+the_cookie;
			document.cookie = the_cookie;
			document.location = '<?=$_SERVER['PHP_SELF']?>';
		}
		document.body.addEventListener('orientationchange', writeCookie );
		writeCookie();
	</script>
<?php
	}
?>

Some examples of this code working :