Breadrumbs...what's wrong with micro-markup?

Question

Yii

Why are the following not displayed in the debugger: 'li itemprop', 'span itemprop', 'meta'?

but it should be something like this;

blog\one.php

<?php
  

    /* @var $this yii\web\View */
   /* @var $blog medeyacom\Blog */
   /* @throws NotFoundHttpException if the model cannot be found
  */
use yii\helpers\Html;
use yii\widgets\Breadcrumbs;

 

  $this->title = $blog->title;
  /*$desc = \yii\helpers\StringHelper::truncateWords(strip_tags($blog->body),20, '');*/
  $this->registerMetaTag(['property'=>'og:title','content'=>$this->title]);

 $this->registerMetaTag(['name'=>'description','content'=>$desc]);
  $this->registerMetaTag(['property'=>'og:description','content'=>$desc]);
  $this->registerMetaTag(['property'=>'og:site_name','content'=>$this->title]);


$this->params['breadcrumbs'] = [
  ['label'=>'публикации','url'=>['blog/index']],
  ['label'=>$blog->title]
];

?>

BreadcrumbsWidget

<?php
namespace common\widgets;


use yii;
use yii\helpers\ArrayHelper;
use yii\base\InvalidConfigException;
use yii\helpers\Html;
use yii\base\Widget;




class BreadcrumbsWidget extends yii\base\Widget

{    

  /**
     * @var string the name of the breadcrumb container tag.
     */
    public $tag = 'ul';
    /**
     * @var array the HTML attributes for the breadcrumb container tag.
     * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
     */
    public $options = ['class' => 'breadcrumb'];
    /**
     * @var bool whether to HTML-encode the link labels.
     */
    public $encodeLabels = true;
    /**
     * @var array the first hyperlink in the breadcrumbs (called home link).
     * Please refer to  on the format of the link.
     * If this property is not set, it will default to a link pointing to 
     * with the label 'Home'. If this property is false, the home link will not be rendered.
     */
    public $homeLink;
    /**
     * @var array list of links to appear in the breadcrumbs. If this property is empty,
     * the widget will not render anything. Each array element represents a single link in the breadcrumbs
     * with the following structure:
     *
     * ```php
     * [
     *     'label' => 'label of the link',  // required
     *     'url' => 'url of the link',      // optional, will be processed by Url::to()
     *     'template' => 'own template of the item', // optional, if not set $this->itemTemplate will be used
     * ]
     * ```
     *
     * If a link is active, you only need to specify its "label", and instead of writing `['label' => $label]`,
     * you may simply use `$label`.
     *
     * Since version 2.0.1, any additional array elements for each link will be treated as the HTML attributes
     * for the hyperlink tag. For example, the following link specification will generate a hyperlink
     * with CSS class `external`:
     *
     * ```php
     * [
     *     'label' => 'demo',
     *     'url' => 'http://example.com',
     *     'class' => 'external',
     * ]
     * ```
     *
     * Since version 2.0.3 each individual link can override global  param like the following:
     *
     * ```php
     * [
     *     'label' => '<strong>Hello!</strong>',
     *     'encode' => false,
     * ]
     * ```
     *
     */
    public $links = [];
    /**
     * @var string the template used to render each inactive item in the breadcrumbs. The token `{link}`
     * will be replaced with the actual HTML link for each inactive item.
     */
    public $itemTemplate = "<li>{link}<li/>\n";
    /**
     * @var string the template used to render each active item in the breadcrumbs. The token `{link}`
     * will be replaced with the actual HTML link for each active item.
     */
    public $activeItemTemplate = "<li class=\"active\">{link}</li>\n";



  public function run()
    {
        if (empty($this->links)) {
            return;
        }
        $links = [];
        if ($this->homeLink === null) {
            $links[] = $this->renderItem([
                'label' => Yii::t('yii', 'Home'),
                'url' => Yii::$app->homeUrl,
            ], $this->itemTemplate, 1);
        } elseif ($this->homeLink !== false) {
            $links[] = $this->renderItem($this->homeLink, $this->itemTemplate, 1);
        }
        foreach ($this->links as $key=>$link) {
            if (!is_array($link)) {
                $link = ['label' => $link];
            }
            $links[] = $this->renderItem($link, isset($link['url']) ? $this->itemTemplate : $this->activeItemTemplate, ($key + 2));
        }
        echo Html::tag($this->tag, implode('', $links), $this->options);
    }

  protected function renderItem($link, $template, $key)
    {
        $encodeLabel = ArrayHelper::remove($link, 'encode', $this->encodeLabels);
        if (array_key_exists('label', $link)) {
            $label = $encodeLabel ? Html::encode($link['label']) : $link['label'];
        } else {
            throw new InvalidConfigException('The "label" element is required for each link.');
        }
        if (isset($link['template'])) {
            $template = $link['template'];
        }
        if (isset($link['url'])) {
            $options = $link;
            unset($options['template'], $options['label'], $options['url']);
            $link = Html::a(Html::tag('i', $label, ['itemprop'=> 'name']), $link['url'], array_merge ($options,['itemprop'=>'item'])). "<meta itemprop=\"position\" content=\"$key\" />";  
        } else {
            $link = Html::tag('span', Html::tag('span', $label, ['itemprop'=>'name']),['itemprop'=>'item']). "<meta itemprop=\"position\" content=\"$key\" />"; 
        }
        return strtr($template, ['{link}' => $link]);
    }
}

The _top_nav.php file is included in layouts\main like this: views\block\_top_nav.php<?=$this->render('/block/_top_nav')?>

<?php


use yii\helpers\Html;
use yii\helpers\Url;
use yii\bootstrap\Nav;
use yii\bootstrap\NavBar;
use yii\widgets\Breadcrumbs;
use frontend\assets\AppAsset;
use common\widgets\Alert;
use common\widgets\BreadcrumbsWidget;

 


$this->title = '_top_nav';
?>
<header>
<div class ='container'>
<div id ="breadcrumbs" class="hidden-xs">
 <?= common\widgets\BreadcrumbsWidget::widget([
 	'options'=> ['itemscope'=>'', 'itemtype'=>"http://schema.org/BreadcrumbList", 'class'=> 'breadcrumb'],
 	'homeLink'=> ['label'=>'Главная','url'=>Url::home()],
   	'itemTemplate'=> "<li itemprop=\"itemListElement\" itemscope
      itemtype= \"http://schema.org/ListItem\"
>{link}</li>\n", 
    'activeItemTemplate'=> "<li itemprop=\"itemListElement\" itemscope
      itemtype= \"http://schema.org/ListItem\" class=\"active\">{link}</li>\n", 
             'links' => 
           /*  ['label'=>'','url'=>'','template'=>''], переопределить link, передать html можно
             [],
             [], */
             (isset($this->params['breadcrumbs']))
         ?$this->params['breadcrums']:[],
     ]);?>
</div>

<a href="#" id ="open-menu-button"><i class='fa fa-bars' aria-hidden="true"></i>Mеню</a>


</div>
</header>
     




 /*
text
*/