Detect screen resolution and pass it to PHP using AJAX (no refresh)

How to find user's screen resolution and pass it to PHP using AJAX

[colombo]

I'm trying to find the user screen resolution via Javascript and then pass it to PHP on the same page using AJAX without refreshing the page.

I manage to find the screen resolution , but i have no idea how to use AJAX in order to pass the variables to PHP without refreshing the page.

I search the forum and didn't find a got example, please help.

I have:
<script language="javascript">
var viewportwidth;
var viewportheight;
viewportwidth = window.innerWidth,
viewportheight = window.innerHeight
</script>

Now i need help to use viewportwidth and viewportheight as PHP variables.

Thanks...

[httpwebwitch]

You won't be able to use these client-side variables in the *same PHP script* that rendered the current page. The best you can achieve is to send the screen data to the server, then the server can use it the *next* time it renders something.

There are lots of nifty tricks you can do, making a second request to the server, to get content that is formatted for a particular screen size, and using DOM techniques to update the current page. It's all possible without a refresh.

i have no idea how to use AJAX

then you've got some reading to do!

start here:
[w3schools.com...]