Breadcrumb WordPress, support taxonomy, and post types

nexo_breadcrumb.php

<?php
function nexo_breadcrumb(array $options = array()) {

    // default values assigned to options
    $options = array_merge(array(
        'crumbId'       => 'nav_crumb',                             // id for the breadcrumb Div
        'crumbClass'    => 'nav_crumb',                             // class for the breadcrumb Div
        'beginningText' => '',                                      // text showing before breadcrumb starts
        'showOnHome'    => 1,                                       // 1 - show breadcrumbs on the homepage, 0 - don't show
        'delimiter'     => '<i class="fa fa-angle-right"></i>',     // delimiter between crumbs
        'homePageText'  => 'Home',                                  // text for the 'Home' link
        'showHome'      => 1,                                       // show home on breadcrumb
        'showCurrent'   => 1,                                       // 1 - show current post/page title in breadcrumbs, 0 - don't show
        'linkBefore'    => '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">',
        'linkAfter'     => '</span>',
        'beforeTag'     => '<span class="current">',                // tag before the current breadcrumb
        'afterTag'      => '</span>',                               // tag after the current crumb
        'showTitle'     => 1                                        // showing post/page title or slug if title to show then 1
    ), $options);

    $crumbId       = $options['crumbId'];
    $crumbClass    = $options['crumbClass'];
    $beginningText = $options['beginningText'];
    $showOnHome    = $options['showOnHome'];
    $delimiter     = $options['delimiter'];
    $homePageText  = $options['homePageText'];
    $showHome      = $options['showHome'];
    $showCurrent   = $options['showCurrent'];
    $linkBefore    = $options['linkBefore'];
    $linkAfter     = $options['linkAfter'];
    $beforeTag     = $options['beforeTag'];
    $afterTag      = $options['afterTag'];
    $showTitle     = $options['showTitle'];

    global $post;

    $wp_query = $GLOBALS['wp_query'];

    $homeLink = get_bloginfo('url');

    echo '<div id="' . $crumbId . '" class="' . $crumbClass . '" itemscope itemtype="http://schema.org/BreadcrumbList">' . $beginningText;

    // if is fornt page or home
    if (is_home() || is_front_page()) {

        if ($showOnHome == 1)
            echo $beforeTag . $homePageText . $afterTag;

    // if is not home
    } else {

        // show home link
        if($showHome == 1) {
            echo $linkBefore .  '<a href="' . $homeLink . '">' . $homePageText . '</a> ' . $linkAfter . $delimiter . ' ';
        }

        // category page
        if (is_category()) {
            $thisCat = get_category(get_query_var('cat'), false);
            if ($thisCat->parent != 0)
                echo get_category_parents($thisCat->parent, TRUE, ' ' . $delimiter . ' ');
            echo $beforeTag . '"' . single_cat_title('', false) . '"' . $afterTag;
        // custom taxonomy page
        } elseif (is_tax()) {
            $term    = get_term_by('slug', get_query_var('term'), get_query_var('taxonomy'));
            $parents = array();
            $parent  = $term->parent;
            while ($parent) {
                $parents[]  = $parent;
                $new_parent = get_term_by('id', $parent, get_query_var('taxonomy'));
                $parent     = $new_parent->parent;
            }
            if (!empty($parents)) {
                $parents = array_reverse($parents);
                foreach ($parents as $parent) {
                    $item = get_term_by('id', $parent, get_query_var('taxonomy'));
                    echo  $linkBefore . '<a href="' . get_term_link($item->slug, get_query_var('taxonomy')) . '">' . $item->name . '</a>' . $linkAfter . $delimiter;
                }
            }
            $queried_object = $wp_query->get_queried_object();
            echo $beforeTag . $queried_object->name . $afterTag;

        // search results
        } elseif (is_search()) {
            echo $beforeTag . '"' . get_search_query() . '"' . $afterTag;

        // archive day
        } elseif (is_day()) {
            echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
            echo '<a href="' . get_month_link(get_the_time('Y'), get_the_time('m')) . '">' . get_the_time('F') . '</a> ' . $delimiter . ' ';
            echo $beforeTag . get_the_time('d') . $afterTag;

        // archive month
        } elseif (is_month()) {
            echo '<a href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
            echo $beforeTag . get_the_time('F') . $afterTag;

        // archive year
        } elseif (is_year()) {
            echo $beforeTag . get_the_time('Y') . $afterTag;

        // single and is not midia
        } elseif (is_single() && !is_attachment()) {

            if ($showTitle)
                $title = get_the_title();
            else
                $title = $post->post_name;

            if (get_post_type() == 'product') {
                // it is for custom post type with custome taxonomies like
                //Breadcrumb would be : Home Furnishings > Bed Covers > Cotton Quilt King Kantha Bedspread
                // product = Cotton Quilt King Kantha Bedspread, custom taxonomy product_cat (Home Furnishings -> Bed Covers)
                // show  product with category on single page
                if ($terms = wp_get_object_terms($post->ID, 'product_cat')) {

                    $term = current($terms);

                    $parents = array();

                    $parent = $term->parent;
                    while ($parent) {

                        $parents[] = $parent;

                        $new_parent = get_term_by('id', $parent, 'product_cat');

                        $parent = $new_parent->parent;

                    }
                    if (!empty($parents)) {

                        $parents = array_reverse($parents);

                        foreach ($parents as $parent) {

                            $item = get_term_by('id', $parent, 'product_cat');

                            echo $linkBefore . '<a href="' . get_term_link($item->slug, 'product_cat') . '">' . $item->name . '</a>' . $linkAfter . $delimiter;

                        }

                    }
                    echo '<a href="' . get_term_link($term->slug, 'product_cat') . '">' . $term->name . '</a>' . $delimiter;
                }
                echo $beforeTag . $title . $afterTag;

            // custom post types
            } elseif (get_post_type() != 'post') {
                $post_type = get_post_type_object(get_post_type());
                $slug      = $post_type->rewrite;
                echo $linkBefore . '<a href="' . $homeLink . '/' . $slug['slug'] . '/">' . $post_type->labels->singular_name . '</a>' . $linkAfter;
                if ($showCurrent == 1)
                    echo ' ' . $delimiter . ' ' . $beforeTag . $title . $afterTag;
            } else {
                $cat  = get_the_category();
                $cat  = $cat[1];
                $cats = get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');

                if ($showCurrent == 0)
                    $cats = preg_replace("#^(.+)\s$delimiter\s$#", "$1", $cats);

                echo $cats;

                if ($showCurrent == 1)
                    echo $beforeTag . $title . $afterTag;

            }

        } elseif (!is_single() && !is_page() && get_post_type() != 'post' && !is_404()) {

            $post_type = get_post_type_object(get_post_type());

            echo $beforeTag . $post_type->labels->singular_name . $afterTag;

        } elseif (is_attachment()) {

            $parent = get_post($post->post_parent);
            $cat    = get_the_category($parent->ID);
            $cat    = $cat[0];
            echo get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');
            echo $linkBefore . '<a href="' . get_permalink($parent) . '">' . $parent->post_title . '</a>' . $linkAfter;
            if ($showCurrent == 1)
                echo ' ' . $delimiter . ' ' . $beforeTag . get_the_title() . $afterTag;

        } elseif (is_page() && !$post->post_parent) {
            $title = ($showTitle) ? get_the_title() : $post->post_name;

            if ($showCurrent == 1)
                echo $beforeTag . $title . $afterTag;

        } elseif (is_page() && $post->post_parent) {
            $parent_id   = $post->post_parent;
            $breadcrumbs = array();
            while ($parent_id) {
                $page          = get_page($parent_id);
                $breadcrumbs[] = $linkBefore . '<a href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a>' . $linkAfter;
                $parent_id     = $page->post_parent;
            }
            $breadcrumbs = array_reverse($breadcrumbs);
            for ($i = 0; $i < count($breadcrumbs); $i++) {
                echo $breadcrumbs[$i];
                if ($i != count($breadcrumbs) - 1)
                    echo ' ' . $delimiter . ' ';
            }
            $title = ($showTitle) ? get_the_title() : $post->post_name;

            if ($showCurrent == 1)
                echo ' ' . $delimiter . ' ' . $beforeTag . $title . $afterTag;

        } elseif (is_tag()) {

            echo $beforeTag . '"' . single_tag_title('', false) . '"' . $afterTag;

        } elseif (is_author()) {
            global $author;
            $userdata = get_userdata($author);

            echo $beforeTag . '' . $userdata->display_name . $afterTag;

        } elseif (is_404()) {

            echo $beforeTag . 'Error 404' . $afterTag;

        }

        if (get_query_var('paged')) {
            if (is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() || is_tax())
                echo ' (';
            echo __('Page') . ' ' . get_query_var('paged');
            if (is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() || is_tax())
                echo ')';
        }
    }
    echo '</div>';
} ?>