how do I get screen resolution in PHP

[michal317]

I looked all over and the only function I found was:
GET[$_screen]
but it didn't work.
anyone has any idea how to use it?

[jatar_k]

well, what you have there wouldn't work and I am not sure what it is

looks like the screen res is passed in a $_GET var though I am not sure from where

you might be better off using javascript to get the screen res

[ergophobe]

Remember too that even if you do manage to grab the screen res with Javascript and put it in a URL and pass it to PHP as a GET param, that is only useful for the *next* page, not the *current* page.

The way you would need to do it is to have Javascript that appends the query string to the URL when the user clicks on it, but in any case the user would need to view one page before you could do anything with PHP.

[TomAnthony]

With Ajax, you could detect the resolution with Javascript, then send requests for the rest of the page, passing the resolution.

Having said that, you'd need to be careful with this, and not get too overzealous. Done right it could improve certain sites, done wrong, it could be a UI disaster.

Let us know how you get on!

[FiRe]

Put this on the page:

<script language="javascript">
window.location.href = "screen.php?width=" + screen.width + "&height=" + screen.height;
</script>

Then create a file called screen.php and use this:

<?php
$width = $_GET['width'];
$height = $_GET['height'];

echo "You are using a $width x $height screen resolution";
?>

[rainborick]

You need to check that the query string is empty/null:

<script language="javascript">
 if (window.location.search == "") {
window.location.href = window.location + "?width=" + screen.width + "&height=" + screen.height;
 }
</script>

to prevent an infinite loop.

[henry0]

Hi Rainborick
with the first option I see how the file screen.php is created

window.location.href = "screen.php?width=" + screen.width + "&height=" + screen.height;

but what is the file name/created with your method?

window.location.href = window.location + "?width=" + screen.width + "&height=" + screen.height;

Obviously I am not much of a JS person :)

[Tastatura]

As an alternative to "GET" approach, you can write screen resolution to cookie with JS, and then read it "in" with PHP. Just something else to consider….