教学用自定义面包屑导航

function custom_breadcrumbs() {
    // Define breadcrumb separator
    $separator = ' » '; // Change this to your desired separator

    // Start breadcrumb output
    $output = '<div class="erx-m-bot erx-current">';
    $output .= '<a href="' . esc_url(home_url('/')) . '">' . __('首页', 'text-domain') . '</a>' . $separator; // "首页" means "Home"

    if (!is_front_page()) {
        // Add Home link if not on the front page
        $output .= '<a href="' . esc_url(home_url('/')) . '">' . __('Home', 'text-domain') . '</a>' . $separator;
    }

    if (is_category() || is_single()) {
        // Category and single post breadcrumbs
        $category = get_the_category();
        if ($category) {
            $output .= '<a href="' . esc_url(get_category_link($category[0]->term_id)) . '">' . $category[0]->name . '</a>';
        }
        if (is_single()) {
            $output .= $separator . get_the_title();
        }
    } elseif (is_page()) {
        // Page breadcrumbs
        global $post;
        if ($post->post_parent) {
            $parent_id = $post->post_parent;
            $breadcrumbs = array();
            while ($parent_id) {
                $page = get_post($parent_id);
                $breadcrumbs[] = '<a href="' . esc_url(get_permalink($page->ID)) . '">' . get_the_title($page->ID) . '</a>';
                $parent_id = $page->post_parent;
            }
            $breadcrumbs = array_reverse($breadcrumbs);
            foreach ($breadcrumbs as $crumb) {
                $output .= $crumb . $separator;
            }
        }
        $output .= get_the_title();
    }

    // End breadcrumb output
    $output .= '</div>';

    // Output the breadcrumbs
    echo $output;
}