frontend/widgets/HreflangWidget.php

<?php
    
    namespace frontend\widgets;
    
    /**
     * User: timur
     * Date: 17.02.18
     * Time: 8:29
     */
    
    use yii\base\Widget;
    use artbox\core\models\Language;
    use yii\helpers\Url;
    
    /**
     * Class HreflangWidget
     *
     * @property Language[] $languages
     * @package frontend\widgets
     */
    class HreflangWidget extends Widget
    {
        
        public $languages;
        
        public function init()
        {
            parent::init();
            
            if (!isset($this->languages)) {
                $this->languages = Language::getActive();
            }
            
        }
        
        public function run()
        {
            
            foreach ($this->languages as $language) {
                
                ?>
              
              <link rel="alternate" hreflang="<?= ( $language->url === "ua" ? "uk" : $language->url ) ?>" href="<?= rtrim(
                  Url::to(
                      [ \Yii::$app->requestedRoute ] + \Yii::$app->request->get() + [ 'language_id' => $language->id ],
                      
                      true
                  ),
                  '/'
              ) ?>">
                
                <?php
                
            }
            
            parent::run();
        }
    }