breadCrumbs.php

/**
 * Light breadcrumbs lookup using the native wp_nav_menu
 *
 * @param string $themeLocation
 * @param string $separator
 *
 * @return string
 */
function getBreadcrumbs($themeLocation = 'primary', $separator = ' ⟩ ') {

    if (($locations = get_nav_menu_locations()) && isset($locations[ $themeLocation ])) {
        $menu  = wp_get_nav_menu_object($locations[$themeLocation]);
        $items = wp_get_nav_menu_items($menu);
        _wp_menu_item_classes_by_context($items); // Set up the class variables, including current-classes
        $crumbs = ["<ul class=\"crumbs-list\">"];
        $crumbs[] = "<li><a href=\"" . get_bloginfo('url') . "\" title=\"Home\">Home</a></li>";

        foreach ($items as $item) {
            if ($item->current_item_ancestor || $item->current) {
                $crumbs[] = "<li><a href=\"{$item->url}\" title=\"{$item->title}\">$separator {$item->title}</a></li>";
            }
        }

        $crumbs[] = "</ul>";

        return implode(' ', $crumbs);
    }
}