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PHP-gettext 1.0 (https://launchpad.net/php-gettext)

Copyright 2003, 2006, 2009 -- Danilo "angry with PHP[1]" Segan Licensed under GPLv2 (or any later version, see COPYING)

[1] PHP is actually cyrillic, and translates roughly to "works-doesn't-work" (UTF-8: Ради-Не-Ради)

Introduction

How many times did you look for a good translation tool, and
found out that gettext is best for the job? Many times.

How many times did you try to use gettext in PHP, but failed
miserably, because either your hosting provider didn't support
it, or the server didn't have adequate locale? Many times.

Well, this is a solution to your needs. It allows using gettext
tools for managing translations, yet it doesn't require gettext
library at all. It parses generated MO files directly, and thus
might be a bit slower than the (maybe provided) gettext library.

PHP-gettext is a simple reader for GNU gettext MO files. Those
are binary containers for translations, produced by GNU msgfmt.

Why?

I got used to having gettext work even without gettext
library. It's there in my favourite language Python, so I was
surprised that I couldn't find it in PHP. I even Googled for it,
but to no avail.

So, I said, what the heck, I'm going to write it for this
disguisting language of PHP, because I'm often constrained to it.

Features

o Support for simple translations Just define a simple alias for translate() function (suggested use of _() or gettext(); see provided example).

o Support for ngettext calls (plural forms, see a note under bugs) You may also use plural forms. Translations in MO files need to provide this, and they must also provide "plural-forms" header. Please see 'info gettext' for more details.

o Support for reading straight files, or strings (!!!) Since I can imagine many different backends for reading in the MO file data, I used imaginary abstract class StreamReader to do all the input (check streams.php). For your convenience, I've already provided two classes for reading files: FileReader and StringReader (CachedFileReader is a combination of the two: it loads entire file contents into a string, and then works on that). See example below for usage. You can for instance use StringReader when you read in data from a database, or you can create your own derivative of StreamReader for anything you like.

Bugs

Report them on https://bugs.launchpad.net/php-gettext

Usage

Put files streams.php and gettext.php somewhere you can load them
from, and require 'em in where you want to use them.

Then, create one 'stream reader' (a class that provides functions
like read(), seekto(), currentpos() and length()) which will
provide data for the 'gettext_reader', with eg.
  $streamer = new FileStream('data.mo');

Then, use that as a parameter to gettext_reader constructor:
  $wohoo = new gettext_reader($streamer);

If you want to disable pre-loading of entire message catalog in
memory (if, for example, you have a multi-thousand message catalog
which you'll use only occasionally), use "false" for second
parameter to gettext_reader constructor:
  $wohoo = new gettext_reader($streamer, false);

From now on, you have all the benefits of gettext data at your
disposal, so may run:
  print $wohoo->translate("This is a test");
  print $wohoo->ngettext("%d bird", "%d birds", $birds);

You might need to pass parameter "-k" to xgettext to make it
extract all the strings. In above example, try with
  xgettext -ktranslate -kngettext:1,2 file.php
what should create messages.po which contains two messages for
translation.

I suggest creating simple aliases for these functions (see
example/pigs.php for how do I do it, which means it's probably a
bad way).

Usage with gettext.inc (standard gettext interfaces emulation)

Check example in examples/pig_dropin.php, basically you include
gettext.inc and use all the standard gettext interfaces as
documented on:

   http://www.php.net/gettext

The only catch is that you can check return value of setlocale()
to see if your locale is system supported or not.

Example

See in examples/ subdirectory. There are a couple of files.
pigs.php is an example, serbian.po is a translation to Serbian
language, and serbian.mo is generated with
   msgfmt -o serbian.mo serbian.po
There is also simple "update" script that can be used to generate
POT file and to update the translation using msgmerge.

TODO:

o Improve speed to be even more comparable to the native gettext implementation.

o Try to use hash tables in MO files: with pre-loading, would it be useful at all?

Never-asked-questions:

o Why did you mark this as version 1.0 when this is the first code release?

Well, it's quite simple. I consider that the first released thing
should be labeled "version 1" (first, right?). Zero is there to
indicate that there's zero improvement and/or change compared to
"version 1".

I plan to use version numbers 1.0.* for small bugfixes, and to
release 1.1 as "first stable release of version 1".

This may trick someone that this is actually useful software, but
as with any other free software, I take NO RESPONSIBILITY for
creating such a masterpiece that will smoke crack, trash your
hard disk, and make lasers in your CD device dance to the tune of
Mozart's 40th Symphony (there is one like that, right?).

o Can I...?

Yes, you can. This is free software (as in freedom, free speech),
and you might do whatever you wish with it, provided you do not
limit freedom of others (GPL).

I'm considering licensing this under LGPL, but I *do* want
*every* PHP-gettext user to contribute and respect ideas of free
software, so don't count on it happening anytime soon.

I'm sorry that I'm taking away your freedom of taking others'
freedom away, but I believe that's neglible as compared to what
freedoms you could take away. ;-)

Uhm, whatever.