Here is a little bit more info:

What I want to do:
I have website with a few main pages and sub pages and sub sub pages. Each area (each main page is an area with some sub pages) has a different color background. In other words a main page and the children (sub pages) have the same background, but each area is different. The color value of the area’s background is stored in a custom field in each main page.

So I wrote a style_dynamic.php with the following blocks in it.
- first I require wp-blog-header.php
- then with a function I get the color value from the custom field of the main page or if it is a child from the top parent (main page)
- then I declare this php file as a css header(‘Content-type: text/css’);
- then I write the css style with the variable

The problem:
It seems the color value is retrieved from the custom field but somehow not read by the css.

&lt?php
require(‘../../../wp-blog-header.php’);

function get_color_value(){
global $post;
if(is_page() && $post-&gtpost_parent){//if the current post is a page and has a parent, then:

$parent_id = $post-&gtpost_parent; // assign the id of the parent
$parent_post = get_post($parent_id); //get the parent post

// if current page is in the sub sub level or deeper nested
while($parent_post-&gtpost_parent){ // if the parent post has a parent, then
$parent_id = $parent_post-&gtpost_parent;
$parent_post = get_post($parent_id);
}

}else{
$parent_id = $post->ID; //if it doesn’t have a parent, it must be a parent, so its own ID gets stored as $parent.
}

$key = “bg_color”;
$single = true;
$post_id = $parent_id;
$color_value .= get_post_meta($post_id, $key, $single);

return $color_value;
}
$color = get_color_value();

// declare the output of the file as CSS
header(‘Content-type: text/css’);

?&gt
#headerBg {
background-color: &lt?=$color?>
}

Also, it looks like some of the code you entered here was stripped by WordPress for security. Please make sure that you escape all less than and greater than signs (< and >) to ensure the code stays whole.

post_parent){//if the current post is a page and has a parent, then:

?>
#headerBg {
background-color: ;
}

post_parent){//if the current post is a page and has a parent, then:

?>
#headerBg {
background-color: ;
}


Help appreciated!

I try read a custom field (background color) from a page and use that value in a dynamic cssStyle.php.

But if I add a template function in the cssStyle.php like get_post() it does not work.
I assume the problem is that the cssStyle.php is called in the header and template functions are not available.

Any help appreciated!

http://websitetips.com/articles/optimization/css/crunch/

$file_contents = preg_replace(‘!/\*[^*]*\*+([^/][^*]*\*+)*/!’, ”, $file_contents); // removes comments from css

Very smart, thanks for sharing it!

Am I seeing that you name all your css files with a .php extension? If you want to keep you .css extension and use php tags in them, try this:

/css/.htaccess:
RewriteEngine on
RewriteRule \.(.*)$ dynamic_css.php [L]

/css/dynamic_css.php:
if ($file_name = basename($_SERVER['REQUEST_URI'])) {
    header('Content-type: text/css');
    eval('?>'.file_get_contents($file_name));
}   

Of course it means adding 2 new files to your css folder. But it makes dynamic-css files transparent to the rest of your application.