Gettext .po and .mo files

Hi all!

I read many posts, forums, google but nothing help in this problem…

I would like to translate my app with .po and .mo files.

My setup with PhpMessageSource working fine, but its not editable easily.

When i change the settings to GettextMessageSource the text in my php file not translate anymore.

I have 3 questions.

  1. Can i use PoEdit for read and translate this? <?= \Yii::t(‘app’, ‘try’); ?> And if can, how can i read the texts?

  2. What is the wrong in my settings?

  3. If i only use .po file without .mo i get an error message because of missing .mo file. Is this normal?

I have an advanced application.

Here is my common/config/main-locale.php

return [

    'bootstrap' => ['localeUrls'],

    'language'=> 'en',

    'sourceLanguage' => 'en',

    'components' => [


        // URL handler

        'localeUrls' => [

            'class' => 'codemix\localeurls\LocaleUrls',

            // List all supported languages here

            'languages' => ['en_US','en','hu_HU','hu']


        // Override the urlManager component

        'urlManager' => [

            'class' => 'codemix\localeurls\UrlManager',

            'showScriptName' => false,

            'enablePrettyUrl' => true,


        // language files

        'i18n' => [

            'translations' => [

                'app*' => [

                    'class' => 'yii\i18n\GettextMessageSource',

                    'basePath' => '@common/messages',

                    'sourceLanguage' => 'en',







This is my messages.po in common/messages/hu/messages.po

msgid ""

msgstr ""

"Project-Id-Version: \n"

"POT-Creation-Date: 2015-02-15 19:16+0100\n"

"PO-Revision-Date: 2015-02-15 19:20+0100\n"

"Last-Translator: \n"

"Language-Team: \n"

"Language: hu_HU\n"

"MIME-Version: 1.0\n"

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

"Content-Transfer-Encoding: 8bit\n"

"X-Generator: Poedit 1.7.4\n"

"X-Poedit-Basepath: .\n"

"Plural-Forms: nplurals=2; plural=(n != 1);\n"

"X-Poedit-SourceCharset: UTF-8\n"

"X-Poedit-SearchPath-0: C:\\test\\advanced\\frontend\n"

msgctxt "app"

msgid "try"

msgstr "Próba"

And here is a sample txt in /fontend/views/site/index.php

<?= \Yii::t('app', 'try'); ?>

The "try" txt allways appears in english, but the system return hu language code.

So i don’t know what do i wrong.

Can anybody help me?

Thank you,


Class GettextMessageSource has a property $useMoFile with default value true. The true in this property cause Yii to look for translations in .mo file instead of .po, but the command line tool only generates .po files.

You can either, create .mo files with another tool (e.g. PoEdit) or set $useMoFile to false with config like this

 'i18n' => [

            'translations' => [

                'app*' => [

                    'class' => 'yii\i18n\GettextMessageSource',

                    'basePath' => '@common/messages',

                    'sourceLanguage' => 'en',

                    'useMoFile' => false,




PS: Sry for answering to old topic, but this one popped out when i was looking for solution of this problem.