php to manage css

Hello,
I want to create a php file to check the visitor browser and version and upon it view a certain css

In my pages I have :

Code:

---

<style type="text/css" media="all">@import "/css/css.php?1";</style>

---

in the css.php I have :

Code:

---

<?php if(ereg("\?1$", $REQUEST_URI)) {
if (strstr (getenv('HTTP_USER_AGENT'), 'MSIE')) {
include "/css/ie.css";
}
elseif (strstr (getenv('HTTP_USER_AGENT'), 'Netscape')) {
include "/css/ns.css";
}
elseif (strstr (getenv('HTTP_USER_AGENT'), 'opera')) {
include "/css/opera.css";
}
else {
include "/css/others.css";
}}
?>

---

I would like it to check the version also can anyone help?
Also is it possible to prevent users from downloading the css if accessed css.php?1 ?

Is there a problem with your code as it is? Does it not work?

Here is what I use:

PHP Code:

---

<?

if(eregi("msie.[4|5]",getenv('HTTP_USER_AGENT')))
    $browser = "msie";
// Netscape Navigator?
else if(eregi("nav",getenv('HTTP_USER_AGENT')) or eregi("moz",getenv('HTTP_USER_AGENT')))
    $browser = "nav";
else
    $browser = "other";

if($browser=="msie")
    print "<LINK REL=StyleSheet HREF=\"ie.css\" TYPE=\"text/css\">";
else
    print "<LINK REL=StyleSheet HREF=\"ns.css\" TYPE=\"text/css\">";

?>

---

And yes if you store call your CSS like that through an external php file you should prevent the user from ever seeing the CSS filename. But you will not prevent the really adamant webmaster from seeing your styles-- it's easy to look in your browser cache, sort by time updated, and find which CSS file was yours.

- The code works, but for all versions of IE, NS ..

Users using IE 6 won't C your style ie.css and will C ns.css

I want to add ( =<4 ) for IE
and ( =<6 ) .. so I won't change every time there is a new version

- And Also the users can C the stylesheet
if they went to the php file ..