if (![/COLOR][COLOR="#0000BB"]file_exists[/COLOR][COLOR="#007700"]([/COLOR][COLOR="#0000BB"]$src_uri[/COLOR][COLOR="#007700"])){
[/COLOR][COLOR="#0000BB"]header[/COLOR][COLOR="#007700"]([/COLOR][COLOR="#DD0000"]'HTTP/1.1 404 Not Found'[/COLOR][COLOR="#007700"]);
echo([/COLOR][COLOR="#DD0000"]'HTTP 404 - Not Found'[/COLOR][COLOR="#007700"]);
exit;
}
...
if (!isset([/COLOR][COLOR="#0000BB"]$known_content_types[/COLOR][COLOR="#007700"][[/COLOR][COLOR="#0000BB"]$file_extension[/COLOR][COLOR="#007700"]])){