+$etag = md5($stylecss);
+
+// Only send the CSS file if it was changed
+header('Cache-Control: public');
+header('ETag: "'.$etag.'"');
+header('Last-Modified: '.$modified);
+
+if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) || isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
+
+ $cached_modified = gmdate('r', strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']));
+ $cached_etag = str_replace(array('"', "-gzip"), array('', ''),
+ stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
+
+ if (($cached_modified == $modified) AND ($cached_etag == $etag)) {
+ header('HTTP/1.1 304 Not Modified');
+ exit();
+ }
+}
+echo $stylecss;