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$_GET in a CSS File Issue
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comicIDIOT


Guru


Joined: 01 May 2006
Posts: 5108
Location: SFBA, California
Posted: 27 Mar 2012 04:02:42 am    Post subject: $_GET in a CSS File Issue
My site uses a .PHP file as it's CSS, with great success. However, I'm trying to make a new addition and I'm having extreme difficulty. I'd like to adjust how the visitor views the page depending on which variables are set (i.e. ?ref=cemetech). I figured I'd be able to include another file within my CSS for such things. So, I have getget.php & colors.php linked within my CSS like so.


Code:
<?php

   header("Content-type: text/css");
   include('../inc/getget.php');
   include('../inc/colors.php');

?>


Actually, at the moment I have a duplicate for the header but it's contents are as follows:


Code:
<?php

   include('getget.php');

   if(is_file($refimg)) {
      echo '<!-- Is File -->';
   }
   
   if (!$img) {
      echo '<!-- Not Set -->';
   } else {
      echo '<!-- Is Set: ' . $refimg .' -->';
   }
   
?>


I can't get the same to work for the CSS. If you browse to an image within my portfolio, for example, you match all the criteria needed and you get the echoes on lines 5 and 6 of the page HTML but in the CSS, starting on Line 2 I don't get anything for the background image except the path I hard coded to the variable.

Is there a limitation with CSS that doesn't allow $_GET calls? Or any variables to pass to it? As I even tried removing the include from the CSS file and the line for the background image doesn't even show up, despite the headers include coming before the CSS, as you'll note from the page source.

I tried Googling but the only results I find are for getting the headers sent by the browser. I found this result, but that's a little bit out of my understanding for now. Currently, my CSS looks something like:


Code:
#nav a:hover {
   background: <?=$maincolordark?> url(../img/topgradr.png) center bottom;
}

_________________


-Alex
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benryves


Cemetech Expert


Joined: 12 Aug 2008
Posts: 1359
Location: London, United Kingdom
Posted: 27 Mar 2012 05:40:54 am    Post subject:
You aren't passing a query string to the stylesheet:


Code:
<link rel="stylesheet" type="text/css" media="screen" title="Standard Style" href="/res/css/style.php">


Each HTTP request the browser makes is independent and won't automatically inherit the query string of the referring page. You can append it manually:


Code:
<link
    rel="stylesheet"
    type="text/css"
    media="screen"
    title="Standard Style"
    href="/res/css/style.php?<?php echo htmlspecialchars($_SERVER['QUERY_STRING'], ENT_QUOTES); ?>"
>


Note that <?= is not a good thing to rely on as it can be disabled and as such might not be available on a server you deploy to - use "<?php echo" instead.
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comicIDIOT


Guru


Joined: 01 May 2006
Posts: 5108
Location: SFBA, California
Posted: 27 Mar 2012 07:36:28 pm    Post subject:
Interesting. That's good to know, thanks!

I used <?= from an example I saw online. I'll go through and change those to proper openings and echos though.
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elfprince13


OVER NINE THOUSAND!


Joined: 23 May 2005
Posts: 10234
Location: A galaxy far far away......
Posted: 28 Mar 2012 04:49:21 am    Post subject:
comicIDIOT wrote:
I used <?= from an example I saw online.


Just go here: http://www.w3schools.com/php/
Many PHP "tutorials" teach atrocious habits. Like <?=
_________________
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