PhpGettxt

Simple and dependency free translation API for PHP using GNU Gettext MO-Files.

About

This library is based on MoTranslator and inspired on WordPress translation functions, but without dependency on third party libraries or frameworks.

Why a new Gettext library?

• The php-gettext library is not maintained anymore
• Other libraries depend on third-party libraries or build on third-party frameworks.
• There should be a simple "copy and run" solution.

Why not using native gettext in PHP?

You cannot use locales not known to system, what is something you cannot control from web application.

Why not using JSON, YAML, PHP-Arrays or whatever?

Translators should be able to use their favorite tools available with Gettext (e.g. PoEdit) as well such as web based translations using Weblate. Using custom formats for translations may add another barrier for translators.

Features

• Does not depend on third-party libraries or frameworks
• Simple "copy and run"
• Fast loading GNU Gettext MO-Files
• Translations are stored in memory for fast lookup
• GNU Gettext compatible API functions: for example instead of gettext() use gettxt()
• WordPress compatible API functions: __(), _n(), _x(), _nx(), load_textdomain()

Limitations

Input, output and file encodings should match. Preferably UTF-8 should be used.

Object-oriented API usage

Low level API usage

// include PhpGettxt
require_once 'PhpGettxt/autoload.php';

// use PhpGettxt
use PhpGettxt\MoParser;
use PhpGettxt\TranslationCache;
use PhpGettxt\Translation;

// Load and parse a MO-file 
$parse = new MoParser('/path/to/file.mo');

// Cache result
$cache = new TranslationCache($parse);

// Instantiate the Translation
$translation = new Translation($cache);

Translator API usage

// include PhpGettxt
require_once 'PhpGettxt/autoload.php';

// use PhpGettxt
use PhpGettxt\Translator;

// Get instance
$translator = Translator::getInstance();

// Set locale
$locale = $translator->setLocale('de_DE');
// returns 'de_DE'

// Get locale
$locale = $translator->setLocale();
// returns 'de_DE'

// Alternative get locale
$locale = $translator->getLocale();
// returns 'de_DE'

// Override the name of $GLOBALS to query or set the locale 
$var_name = $translator->setVarname('locale');
// returns 'locale': for $GLOBALS['locale']

// Get current defined name of $GLOBALS to query or set the locale 
$var_name = $translator->getVarname();
// returns 'locale': for $GLOBALS['locale']


// Detects configured locale. It checks:
// - global locale variable: $GLOBALS['locale']
// - environment for `LC_ALL`, `LC_MESSAGES` and `LANG`
$detected_locale = $translator->detectLocale();
// returns the locale name if defined (e.g. 'de_DE'), otherwise 'en'.

$browser_locale = $translator->getAcceptLocale();
// returns the most preferred accepted locale from browser,
// e.g. 'de_DE', or null if none found

// Sets the default directory where to find translation files.
$locale_dir = $translator->setLocaleDir(__DIR__ . '/locales/');

// Sets domain to library default
$translator->setTextdomain();
// or $translator->setTextdomain('default')
// or $translator->setTextdomain('')
// or $translator->setTextdomain(null)

// Sets domain
$domain = $translator->setTextdomain('myapp');
// returns 'myapp'

// Get current domain
$domain = $translator->getTextdomain();
// returns 'myapp'

// Gettext compatible method: Sets domain to library default
$domain = $translator->textdomain('');
// or $translator->textdomain('default');

// Gettext compatible method: Sets the current domain to 'myapp'
$domain = $translator->textdomain('myapp');

// Gettext compatible method: Get current domain
$domain = $translator->textdomain();
// returns the current defined domain

// Sets the path where to find translation files for
// the 'default' domain. The files have to be named
// like 'de.mo', ''de_DE.mo', 'de_AT.mo'.
$translator->bindTextdomain();
// or:
// $translator->bindTextdomain(Translator::DEFAULT_DOMAIN, $locale_dir);

// Binding another domain
// On binding another domain, e.g. 'myapp', then the files have to
// be named like 'myapp-de.mo', 'myapp-de_DE.mo', 'myapp-de_AT.mo'.
$translator->bindTextdomain('myapp', __DIR__ . '/locales/');

// Get default translation 
$translation = $translator->getTranslation();

// Get translation from another domain
$myapp = $translator->getTranslation('myapp');

// Load global functions API
Translator::loadApi();

Translation API usage

Translate a string

// Translate 'Hello World'
echo $translation->gettxt('Hello World');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf($translation->gettxt('Hello %s'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo $translation->gettxt(['Hello %s', 'John']);

Translate a string with context

// Translate 'Hello World'
echo $translation->pgettxt('Context', 'Hello World');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf($translation->pgettxt('Context', 'Hello %s'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo $translation->pgettxt('Context', ['Hello %s', 'John']);

Return a string marked for translation

// Returns 'Hello World'
echo $translation->noop_gettxt('Hello World');

// Method 1: Returns 'Hello %s' and replace '%s' with 'John'
echo sprintf($translation->noop_gettxt('Hello %s'), 'John');

// Method 2: Returns 'Hello %s' and replace '%s' with 'John'
echo $translation->noop_gettxt(['Hello %s', 'John']);

Translate a plural form

// Method 1: returns translation for 'Found %d items'
echo $translation->ngettxt('Found one item', 'Found %d items', 2);

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf($translation->ngettxt('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo $translation->ngettxt('Found one item', 'Found %d items', [2, 2]);

Translate a plural form with context

// Method 1: returns translation for 'Found %d items'
echo $translation->npgettxt('Context', 'Found one item', 'Found %d items', 2);

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf($translation->npgettxt('Context', 'Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo $translation->npgettxt('Context', 'Found one item', 'Found %d items', [2, 2]);

Return plural form marked for translation

// Method 1: returns 'Found %d items'
echo $translation->noop_ngettxt('Found one item', 'Found %d items', 2);

// Method 2: returns 'Found %d items' and replace '%d' with 2
echo sprintf($translation->noop_ngettxt('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo $translation->noop_ngettxt('Found one item', 'Found %d items', [2, 2]);

Gettext compatibility usage

// include PhpGettxt
require_once 'PhpGettxt/autoload.php';

// use PhpGettxt
use PhpGettxt\Translator;

// Load compatibility layer
Translator::loadApi();

// Configure locale
_setlocale(0, 'de');
// or: set_locale('de');

// Configure default text domain
_textdomain(Translator::DEFAULT_DOMAIN);
// or: set_textdomain();

_bindtextdomain(Translator::DEFAULT_DOMAIN, __DIR__ . '/locales/');
// or: load_textdomain(Translator::DEFAULT_DOMAIN,  __DIR__ . '/locales/');

// Gettext compatibility only, does nothing
//_bind_textdomain_codeset('', 'UTF-8');

Translate a string

// Translate 'Hello World'
echo gettxt('Hello World');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(gettxt('Hello %s'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo gettxt(['Hello %s', 'John']);

Translate a string with context

// Translate 'Hello World'
echo pgettxt('Context', 'Hello World');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(pgettxt('Context', 'Hello %s'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo pgettxt('Context', ['Hello %s', 'John']);

Return a string marked for translation

// Returns 'Hello World'
echo noop_gettxt('Hello World');

// Method 1: Returns 'Hello %s' and replace '%s' with 'John'
echo sprintf(noop_gettxt('Hello %s'), 'John');

// Method 2: Returns 'Hello %s' and replace '%s' with 'John'
echo noop_gettxt(['Hello %s', 'John']);

Translate a plural form

// Method 1: returns translation for 'Found %d items'
echo ngettxt('Found one item', 'Found %d items', 2);

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(ngettxt('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo ngettxt('Found one item', 'Found %d items', [2, 2]);

Translate a plural form with context

// Method 1: returns translation for 'Found %d items'
echo npgettxt('Context', 'Found one item', 'Found %d items', 2);

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(npgettxt('Context', 'Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo npgettxt('Context', 'Found one item', 'Found %d items', [2, 2]);

Return plural form marked for translation

// Method 1: returns 'Found %d items'
echo noop_ngettxt('Found one item', 'Found %d items', 2);

// Method 2: returns 'Found %d items' and replace '%d' with 2
echo sprintf(noop_ngettxt('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo noop_ngettxt('Found one item', 'Found %d items', [2, 2]);

Other supported Gettext functions

// Gettext compatible function to translate a string
// from another domain.
echo dgettxt('domain', 'Hello');

// Gettext compatible function to translate a string
// with context from another domain.
echo dpgettxt('domain', 'context', 'Hello');

// Gettext compatible function to translate plurals
// from another domain.
echo dngettxt('domain', 'Found one item', 'Found %d items', 2);

// Gettext compatible function to translate plurals
// with context from another domain.
echo dnpgettxt('domain', 'context', 'Found one item', 'Found %d items', 2);

WordPress compatibility usage

// include PhpGettxt
require_once 'PhpGettxt/autoload.php';

// use PhpGettxt
use PhpGettxt\Translator;

// Load compatibility layer
Translator::loadApi();

// Configure locale
_setlocale(0, 'de');
// or: set_locale('de')

// Configure default text domain
set_textdomain(Translator::DEFAULT_DOMAIN);
load_textdomain(Translator::DEFAULT_DOMAIN, __DIR__ . '/locales/');

// Or alternate
set_locale_dir( __DIR__ . '/locales/');
set_textdomain(Translator::DEFAULT_DOMAIN);
load_textdomain(Translator::DEFAULT_DOMAIN);

// Gettext compatibility only, does nothing
//_bind_textdomain_codeset('', 'UTF-8');

Translate a string

// Translate 'Hello World'
echo __('Hello World');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(__('Hello %s'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo __(['Hello %s', 'John']);

Translate a string from another domain

// Translate 'Hello World'
echo __('Hello World', 'domain');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(__('Hello %s', 'domain'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo __(['Hello %s', 'John'], 'domain');

Translate a string with context

// Translate 'Hello World'
echo _x('Hello World', 'context');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(_x('Hello %s', 'context'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo _x(['Hello %s', 'John'], 'context');

Translate a string with context from another domain

// Translate 'Hello World'
echo _x('Hello World', 'context', 'domain');

// Method 1: Translate 'Hello %s' and replace '%s' with 'John'
echo sprintf(_x('Hello %s', 'context', 'domain'), 'John');

// Method 2: Translate 'Hello %s' and replace '%s' with 'John'
echo _x(['Hello %s', 'John'], 'context', 'domain');

Return a string marked for translation

// Returns 'Hello World'
echo noop__('Hello World');

// Method 1: Returns 'Hello %s' and replace '%s' with 'John'
echo sprintf(noop__('Hello %s'), 'John');

// Method 2: Returns 'Hello %s' and replace '%s' with 'John'
echo noop__(['Hello %s', 'John']);

Return a string marked for translation from another domain

// Returns 'Hello World'
echo noop__('Hello World', 'domain');

// Method 1: Returns 'Hello %s' and replace '%s' with 'John'
echo sprintf(noop__('Hello %s', 'domain'), 'John');

// Method 2: Returns 'Hello %s' and replace '%s' with 'John'
echo noop__(['Hello %s', 'John'], 'domain');

Translate a plural form

// Method 1: returns translation for 'Found %d items'
echo _n('Found one item', 'Found %d items', 2);

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(_n('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo _n('Found one item', 'Found %d items', [2, 2]);

Translate a plural form from another domain

// Method 1: returns translation for 'Found %d items'
echo _n('Found one item', 'Found %d items', 2, 'domain');

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(_n('Found one item', 'Found %d items', 2, 'domain'), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo _n('Found one item', 'Found %d items', [2, 2], 'domain');

Translate a plural form with context

// Method 1: returns translation for 'Found %d items'
echo _nx('Found one item', 'Found %d items', 2, 'context');

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(_nx('Found one item', 'Found %d items', 2, 'context'), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo _nx('Found one item', 'Found %d items', [2, 2], 'context');

Translate a plural form with context from another domain

// Method 1: returns translation for 'Found %d items'
echo _nx('Found one item', 'Found %d items', 2, 'context', 'domain');

// Method 2: returns translation for 'Found %d items' and replace '%d' with 2
echo sprintf(_nx('Found one item', 'Found %d items', 2, 'context', 'domain'), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo _nx('Found one item', 'Found %d items', [2, 2], 'context', 'domain');

Return plural form marked for translation

// Method 1: returns 'Found %d items'
echo noop_n('Found one item', 'Found %d items', 2);

// Method 2: returns 'Found %d items' and replace '%d' with 2
echo sprintf(noop_n('Found one item', 'Found %d items', 2), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo noop_n('Found one item', 'Found %d items', [2, 2]);

Return plural form marked for translation from another domain

// Method 1: returns 'Found %d items'
echo noop_n('Found one item', 'Found %d items', 2, 'domain');

// Method 2: returns 'Found %d items' and replace '%d' with 2
echo sprintf(noop_n('Found one item', 'Found %d items', 2, 'domain'), 2);

// Method 3: returns translation for 'Found %d items' and replace '%d' with 2
echo noop_n('Found one item', 'Found %d items', [2, 2], 'domain');

Other global functions

// Set the name for the $GLOBALS
$name = set_translator_varname('locale');
// Get the name for the $GLOBALS
$name = get_translator_varname('locale');

// Set the text domain; alias for _textdomain($domain)
$domain = set_textdomain('domain'); 
// Get the text domain; alias for _textdomain(null)
$domain = get_textdomain();

// Detects configured locale
$locale = detect_locale()

// Set the locale name; alias for _setlocale(0, $locale)
$locale = set_locale('en')
// Get the locale name; alias for _setlocale(0, null)
$locale = get_locale()

// Get user agent's most preferred accepted locale
$locale = get_accepted_locale();

// Get instance of Translator; alias for Translator::getInstance()
$translator = translator();