function wpf_breadcrumbs() {

    $category = get_query_var( 'documentation_category' );
    $category_term = get_term_by( 'slug', $category, 'documentation_category' );

    if ( empty( $category_term ) ) {
        return;
    }

    ob_start();

    ?>

    <ul class="pp-breadcrumbs">
        <li class="pp-breadcrumbs-item pp-breadcrumbs-item-cat">
            <a class="pp-breadcrumbs-crumb pp-breadcrumbs-crumb-link pp-breadcrumbs-crumb-cat" href="<?php echo home_url()?>/documentation/">Documentation</a>
        </li>
        <li class="pp-breadcrumbs-separator">
            <span class="pp-breadcrumbs-separator-text">/</span>
        </li>
        <li class="pp-breadcrumbs-item pp-breadcrumbs-item-cat">
            <a class="pp-breadcrumbs-crumb pp-breadcrumbs-crumb-link pp-breadcrumbs-crumb-cat" href="<?php echo home_url()?>/documentation/#<?php echo $category_term->slug ?>"><?php echo $category_term->name ?></a>
        </li>
        <li class="pp-breadcrumbs-separator">
            <span class="pp-breadcrumbs-separator-text">/</span>
        </li>
        <li class="pp-breadcrumbs-item pp-breadcrumbs-item-cat">
            <?php the_title(); ?>
        </li>
    </ul>

    <?php

    return ob_get_clean();

}

add_shortcode( 'wpf_breadcrumbs', 'wpf_breadcrumbs' );