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16 years ago
*An important thing to keep in mind*:
Do not forget to set the charset in .po file! 
For example:

"Content-Type: text/plain; charset=UTF-8\n"

Then PHP will be able to find the .mo file you generated, using msgfmt, from the .po file WITH CHARSET SET.

Because of this I've wasted a lot of time debugging my code, testing every single little changes people suggested over this manual and Internet: 

<?php

//this:
setlocale( LC_MESSAGES, 'pt_BR')
//or this:
setlocale( LC_MESSAGES, 'pt_BR.utf8')
//or this:
setlocale( LC_MESSAGES, '')

//this:
putenv("LANG=pt_BR.utf8");
//or this:
putenv("LANGUAGE=pt_BR.utf8");

//this:
bindtextdomain('mydomain', dirname(__FILE__).'/locale');
//or this:
bindtextdomain("*", dirname(__FILE__).'/locale');
//or this:
bindtextdomain('*', dirname(__FILE__).'/locale');

//setting or not "bind_textdomain_codeset()":
bind_textdomain_codeset("mydomain", 'UTF-8');
?>

As well as what locale directory name to set:
./locale/pt_BR.UTF8/LC_MESSAGES/mydomain.mo
or
./locale/pt_BR/LC_MESSAGES/mydomain.mo
or
./locale/pt/LC_MESSAGES/mydomain.mo

Finally, the code which brought the right translated strings (also with the correct charset) was:

<?php

$directory = dirname(__FILE__).'/locale';
$domain = 'mydomain';
$locale ="pt_BR.utf8";

//putenv("LANG=".$locale); //not needed for my tests, but people say it's useful for windows

setlocale( LC_MESSAGES, $locale);
bindtextdomain($domain, $directory);
textdomain($domain);
bind_textdomain_codeset($domain, 'UTF-8');
?>

And the three directory's names worked out, using the pt_BR.utf8 locale. (My tests were made restarting Apache then trying each directory).

I hope to help someone else not to waste as much time as I've wasted... =P

Using:
Ubuntu 8.04 (hardy)
Apache 2.2.8
PHP 5.2.4-2ubuntu5.6
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