$lifetime = 1800;
header("Content-type: application/x-javascript"); // Correct MIME type
- header("Last-Modified: " . gmdate("D, d M Y H:i:s", lastmodified) . " GMT");
+ header("Last-Modified: " . gmdate("D, d M Y H:i:s", $lastmodified) . " GMT");
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $lifetime) . " GMT");
header("Cache-control: max_age = $lifetime");
header("Pragma: ");