-header("Vary: Accept");
-if(stristr($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml')) {
- $content_type = 'application/xhtml+xml; charset=utf-8';
-} else {
- $content_type = 'text/html; charset=utf-8';
-}
-
-header('Content-Type: ' . $content_type);
-