[RESOLVED] JS to PHP

[NZ_Kiwis]

I want to set the vairable $w depending on my window size.

I have this but always alerts '5' regardless of windows size.

<script type="text/javascript">
var w = window.innerWidth;

if (window.innerWidth >= 640){
	<?php $w = 15; ?>
	/*alert('over');*/	
} else {
	<?php $w = 5; ?>	
	/*alert('under');*/
}
alert(<?php echo $w; ?>);
</script>

[Weedpacket]

That's because the PHP runs on the server before it sends the JavaScript to run on the client.

If you need that information for some reason you'll need some sort of Ajax communication to send it back to the server.

[peterlee1768]

Actually I want to know about Web 2.0. what is web 2.0 and how it is helpful in SEO(Search Engine Optimization) ?