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Title
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How to add a DropDown Language Picker (i18n) to the Menu
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How-tos
Yii version
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2.0
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i18n,AJAX,bootstrap,internationalization,bootstrap menu
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# How To Add Internationalisation to the NavBar Menu in Yii2
Yii comes with internationalisation (i18n) "out of the box". There are instructions in the manual as to how to configure Yii to use i18n, but little information all in one place on how to fully integrate it into the bootstrap menu. This document attempts to remedy that.
<img src="https://visualaccounts.co.uk/images/screenshots/Screenshot_i18n_s.png" />
The Github repository also contains the language flags, some country flags, a list of languages codes and their language names and a list of the languages Yii recognises "out of the box". A video will be posted on YouTube soon.
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Ensure that your system is set up to use i18n. From the Yii2 Manual:
> Yii uses the `PHP intl` extension to provide most of its I18N features, such as the date and number formatting of the `yii\i18n\Formatter` class and the message formatting using `yii\i18n\MessageFormatter`. Both classes provide a fallback mechanism when the intl extension is not installed. However, the fallback implementation only works well for English target language. So it is highly recommended that you install `intl` when I18N is needed.[...]
. Html::submitButton(
// 'Logout (' . Yii::$app->user->identity->username . ')', // change this line as well to the following:
Yii::t('app', 'Logout ({username})'), ['username' => Yii::$app->user->identity->username]),
['class' => 'nav-link btn btn-link logout']
)[...]
The images should be 25px wide by 15px high. The images **must have** the same name as the language key in the language array in params.php. For example: `fr.png` or `en-US.png`. If the images are not of type ".png" change the code in part **b.** below to the correct file extension.
Place the images in a the directory `/public_htmlweb/images/flags/`.
**b.** Alter the code in `/views/layouts/main.php` so that the code for the "NavBar" reads as follows:[...]
For further reading and information see:
[i18ntutorial on Github](https://github.com/JQL/i18ntutorial)
[Yii2 Internationalization Tutorial](https://www.yiiframework.com/doc/guide/2.0/en/tutorial-i18n)
[PHP intl extensions](https://www.php.net/manual/en/intro.intl.php)
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