/** * Returns array of headers * * @param array $file CDN file array * @return array */ function _get_headers($file) { $allowed_headers = array('Content-Length', 'Content-Type', 'Content-Encoding', 'Content-Language', 'Content-MD5', 'Cache-Control'); $headers = parent::_get_headers($file); foreach ($headers as $header => $value) { if (!in_array($header, $allowed_headers)) { unset($headers[$header]); } } return $headers; }