WordPress Breadcrumbs & Schema Markup

breadcrumb.php

<?php
/**
 * Breadcrumbs
 *
 * @package nunosarmento
 */

// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;


/**
 *
 * Breadcrumbs
 *
 */
 function get_breadcrumbs() {
    $breadcrumbs = array();
    $category_count = 0;
    $parent_arrive = 0;
    if (is_single()) {
        $post_data = get_queried_object();
        $breadcrumbs[$category_count]['id'] = $post_data->ID;
        $breadcrumbs[$category_count]['name'] = $post_data->post_title;
        $category_count++;
        $current_category = get_the_category();
        $current_category_id = $current_category[0]->term_id;
        $category = get_category($current_category_id);
    } else {
        $category = get_category(get_query_var('cat'));
    }
    $breadcrumbs[$category_count]['id'] = $category->term_id;
    $breadcrumbs[$category_count]['name'] = $category->name;
    $category_count++;
    while( $parent_arrive == 0 ) {
        if ($category->category_parent == 0) {
          $parent_arrive = 1;
        } else {
          $breadcrumbs[$category_count]['id'] = $category->category_parent;
          $category = get_category($category->category_parent);
          $breadcrumbs[$category_count]['name'] = $category->name;
        }
      $category_count++;
    }
    $breadcrumbs = array_reverse($breadcrumbs);
    return $breadcrumbs;
}
?>
<?php $breadcrumbs = get_breadcrumbs(); ?>
<ol class="breadcrumbs_list_schema" itemscope itemtype="http://schema.org/BreadcrumbList">
      <li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
      <a itemprop="item" href="<?php echo esc_url( site_url() ); ?>">
        <span itemprop="name">Home</span>
      </a>
          <meta itemprop="position" content="1" />
        </li>
    <?php foreach ($breadcrumbs as $breadcrumb_index => $breadcrumb) { ?>
      <li itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
        <a itemprop="item" href="<?php echo esc_attr( get_category_link($breadcrumb['id']) ); ?>">
          <span itemprop="name"> &#8594; <?php echo esc_attr( $breadcrumb['name'] ); ?></span>
        </a>
        <meta itemprop="position" content="<?php echo esc_attr( $breadcrumb_index + 2 ); ?>" />
      </li>
    <?php } ?>
</ol>

@elegance666 where are you using the code ?