精简面包屑导航

也不知道面包屑导航对于我这种小博客有什么用，索性删除。代码备忘在这里。

//面包屑导航
function dimox_breadcrumbs() {
    $delimiter = '>'; // 分隔符
    $before = '<span>'; // 在当前链接前插入
    $after = '</span>'; // 在当前链接后插入
    if (!is_home() && !is_front_page() || is_paged()) {
        echo '<div itemscope itemtype="http://schema.org/WebPage" class="mbxdh"><b><i class="iconfont icon-shouye"></i>您的位置：</b>';
        global $post;
        $homeLink = home_url();
        echo ' <a itemprop="breadcrumb" href="' . $homeLink . '">首页</a> ' . $delimiter . ' ';
        if (is_category()) { // 分类 存档
            global $wp_query;
            $cat_obj = $wp_query->get_queried_object();
            $thisCat = $cat_obj->term_id;
            $thisCat = get_category($thisCat);
            $parentCat = get_category($thisCat->parent);
            if ($thisCat->parent != 0) {
                $cat_code = get_category_parents($parentCat, TRUE, ' ' . $delimiter . ' ');
                echo $cat_code = str_replace('<a', '<a itemprop="breadcrumb"', $cat_code);
            }
            echo $before . '' . single_cat_title('', false) . '' . $after;
        } elseif (is_day()) { // 天 存档
            echo '<a itemprop="breadcrumb" href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
            echo '<a itemprop="breadcrumb"  href="' . get_month_link(get_the_time('Y'), get_the_time('m')) . '">' . get_the_time('F') . '</a> ' . $delimiter . ' ';
            echo $before . get_the_time('d') . $after;
        } elseif (is_month()) { // 月 存档
            echo '<a itemprop="breadcrumb" href="' . get_year_link(get_the_time('Y')) . '">' . get_the_time('Y') . '</a> ' . $delimiter . ' ';
            echo $before . get_the_time('F') . $after;
        } elseif (is_year()) { // 年 存档
            echo $before . get_the_time('Y') . $after;
        } elseif (is_single() && !is_attachment()) { // 文章
            if (get_post_type() != 'post') { // 自定义文章类型
                $post_type = get_post_type_object(get_post_type());
                $slug = $post_type->rewrite;
                echo '<a itemprop="breadcrumb" href="' . $homeLink . '/' . $slug['slug'] . '/">' . $post_type->labels->singular_name . '</a> ' . $delimiter . ' ';
                echo $before . get_the_title() . $after;
            } else { // 文章 post
                $cat = get_the_category();
                $cat = $cat[0];
                $cat_code = get_category_parents($cat, TRUE, ' ' . $delimiter . ' ');
                echo $cat_code = str_replace('<a', '<a itemprop="breadcrumb"', $cat_code);
                echo $before . get_the_title() . $after;
            }
        } elseif (!is_single() && !is_page() && get_post_type() != 'post') {
            $post_type = get_post_type_object(get_post_type());
            echo $before . $post_type->labels->singular_name . $after;
        } elseif (is_attachment()) { // 附件
            $parent = get_post($post->post_parent);
            $cat = get_the_category($parent->ID);
            $cat = $cat[0];
            echo '<a itemprop="breadcrumb" href="' . get_permalink($parent) . '">' . $parent->post_title . '</a> ' . $delimiter . ' ';
            echo $before . get_the_title() . $after;
        } elseif (is_page() && !$post->post_parent) { // 页面
            echo $before . get_the_title() . $after;
        } elseif (is_page() && $post->post_parent) { // 父级页面
            $parent_id = $post->post_parent;
            $breadcrumbs = array();
            while ($parent_id) {
                $page = get_page($parent_id);
                $breadcrumbs[] = '<a itemprop="breadcrumb" href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a>';
                $parent_id = $page->post_parent;
            }
            $breadcrumbs = array_reverse($breadcrumbs);
            foreach ($breadcrumbs as $crumb){
      echo $crumb . ' ' . $delimiter . ' ';
            echo $before . get_the_title() . $after;}
        } elseif (is_search()) { // 搜索结果
            echo $before;
            printf(__('Search Results for: %s', 'cmp'), get_search_query());
            echo $after;
        } elseif (is_tag()) { //标签 存档
            echo $before;
            printf(__('Tag Archives: %s', 'cmp'), single_tag_title('', false));
            echo $after;
        } elseif (is_author()) { // 作者存档
            global $author;
            $userdata = get_userdata($author);
            echo $before;
            printf(__('Author Archives: %s', 'cmp'), $userdata->display_name);
            echo $after;
        } elseif (is_404()) { // 404 页面
            echo $before;
            _e('Not Found', 'cmp');
            echo $after;
        }
        if (get_query_var('paged')) {
            if (is_home() || is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author()) echo '(' . '第' . get_query_var('paged') . '页' . ')';
        }
        echo '</div>';
    }
}

原始代码及用法：WordPress 添加面包屑导航