* @param array $headers Any additional headers to send if the file exists
* @param bool $sendErrors Send error messages if errors occur (like 404)
* @param array $optHeaders HTTP request header map (e.g. "range") (use lowercase keys)
* @param array $headers Any additional headers to send if the file exists
* @param bool $sendErrors Send error messages if errors occur (like 404)
* @param array $optHeaders HTTP request header map (e.g. "range") (use lowercase keys)