-if(stristr($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml')) {
- $content_type = 'application/xhtml+xml; charset=utf-8';
-} else {
- $content_type = 'text/html; charset=utf-8';
-}
+
+$content_type = 'text/html; charset=utf-8';
+
+if (stristr ($_SERVER['HTTP_ACCEPT'], 'application/xhtml+xml'))
+ $content_type = 'application/xhtml+xml; charset=utf-8';