codemix\localeurls\UrlManager::redirectToLanguage PHP Method

    protected function redirectToLanguage($language)
    {
        $result = parent::parseRequest($this->_request);
        if ($result === false) {
            throw new \yii\web\NotFoundHttpException(Yii::t('yii', 'Page not found.'));
        }
        list($route, $params) = $result;
        if ($language) {
            $params[$this->languageParam] = $language;
        }
        // See Yii Issues #8291 and #9161:
        $params = $params + $this->_request->getQueryParams();
        array_unshift($params, $route);
        $url = $this->createUrl($params);
        // Required to prevent double slashes on generated URLs
        if ($this->suffix === '/' && $route === '') {
            $url = rtrim($url, '/') . '/';
        }
        Yii::trace("Redirecting to {$url}.", __METHOD__);
        Yii::$app->getResponse()->redirect($url);
        if (YII2_LOCALEURLS_TEST) {
            // Response::redirect($url) above will call `Url::to()` internally. So to really
            // test for the same final redirect URL here, we need to call Url::to(), too.
            throw new \yii\base\Exception(\yii\helpers\Url::to($url));
        } else {
            Yii::$app->end();
        }
    }