<?php
putenv("LANG=ru_RU");
setlocale (LC_ALL,"Russian");
$domain = 'my_site';
bindtextdomain ($domain, "./locale");
textdomain ($domain);
echo _('proba');
?>

msgid ""
msgstr ""
"Project-Id-Version: my_site\n"
"POT-Creation-Date: \n"
"PO-Revision-Date: 2006-06-06 13:52+0200\n"
"Last-Translator: Net <net@net.net>;\n"
"Language-Team: my command\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"X-Poedit-Language: Russian\n"
"X-Poedit-Country: RUSSIAN FEDERATION\n"
"X-Poedit-SourceCharset: utf-8\n"
"X-Poedit-Basepath: .\n"
"X-Poedit-SearchPath-0: d:/work/website\n"

# d:/work/website/index.php: 2 
msgid "proba"
msgstr "РџСЂРѕР±Р°"

/src/locale/ru/LC_MESSAGES/rus.mo
                                        rus.po

proba

Проба