Такими вот способами не получается
$ enca xml.php
enca: Cannot determine (or understand) your language preferences.
Please use `-L language', or `-L none' if your language is not supported
(only a few multibyte encodings can be recognized then).
Run `enca --list languages' to get a list of supported languages.
enconv .htaccess -L russian
enconv: Cannot detect native charset for locale ru.
You have to use the `-x' option or the DEFAULT_CHARSET environment variable to set the target encoding manually.