Expires HTTP header

header.inc.php3

@@ -24,7 +24,7 @@ if ($GLOBALS['cfg']['OBGzip']) {
  */
 // Don't use cache (required for Opera)
 $GLOBALS['now'] = gmdate('D, d M Y H:i:s') . ' GMT';
-header('Expires: 0'); // rfc2616 - Section 14.21
+header('Expires: ' . $GLOBALS['now']); // rfc2616 - Section 14.21
 header('Last-Modified: ' . $GLOBALS['now']);
 header('Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0'); // HTTP/1.1
 header('Pragma: no-cache'); // HTTP/1.0