yii2语言切换设置

layout/site.php:

$menuRight = [
        [
            'label' => Yii::t('common', 'Language'),
            'dropDownOptions' => ['id' => 'drow-language', 'style' => 'min-width: 90px'],
            'items' => [
                ['label' => Yii::t('common', 'Chinese'), 'url' => ['/language/lang', 'lang' => 'zh-CN']],
                ['label' => Yii::t('common', 'English'), 'url' => ['/language/lang', 'lang' => 'en-US']],
            ]
        ],
    ];
    echo Nav::widget([
        'options' => ['class' => 'navbar-nav navbar-right'],
        'items' => $menuRight,
    ]);

controllers/LanguageController.php

<?php
namespace frontend\controllers;

use Yii;
use yii\web\Controller;

class LanguageController extends Controller {

    // 多语言处理
    public function actionLang($lang)
    {
        $session = Yii::$app->session;
        $session->open();
        if (isset($lang)) {
            $session['language'] = $lang;
        }
        $this->goBack(Yii::$app->request->headers['Referer']);
    }
}

web/index.php:

$application = new yii\web\Application($config);

$application->language = isset(Yii::$app->session['language']) ? Yii::$app->session['language'] : 'zh-CN';

$application->run();