为WordPress添加一个面包屑导航 – WordPress 教程

如何在你的Wordpres中为页面添加面包屑导航，支持自定义帖子类型、自定义分类。

但貌似在分类归档页面不能显示父子分类层级有点遗憾。

代码实现

将代码添加到当前主题函数模板functions.php中：

/** * WordPress Breadcrumbs */function tsh_wp_custom_breadcrumbs() {     $separator              = '/';    $breadcrumbs_id         = 'tsh_breadcrumbs';    $breadcrumbs_class      = 'tsh_breadcrumbs';    $home_title             = esc_html__('Home', 'your-domain');     // Add here you custom post taxonomies    $tsh_custom_taxonomy    = 'product_cat';     global $post,$wp_query;           // Hide from front page    if ( !is_front_page() ) {               echo '<ul id="' . $breadcrumbs_id . '" class="' . $breadcrumbs_class . '">';                   // Home        echo '<li class="item-home"><a class="bread-link bread-home" href="' . get_home_url() . '" title="' . $home_title . '">' . $home_title . '</a></li>';        echo '<li class="separator separator-home"> ' . $separator . ' </li>';                   if ( is_archive() && !is_tax() && !is_category() && !is_tag() ) {                          echo '<li class="item-current item-archive"><strong class="bread-current bread-archive">' . post_type_archive_title('', false) . '</strong></li>';                      } else if ( is_archive() && is_tax() && !is_category() && !is_tag() ) {                          // For Custom post type            $post_type = get_post_type();                          // Custom post type name and link            if($post_type != 'post') {                                  $post_type_object = get_post_type_object($post_type);                $post_type_archive = get_post_type_archive_link($post_type);                              echo '<li class="item-cat item-custom-post-type-' . $post_type . '"><a class="bread-cat bread-custom-post-type-' . $post_type . '" href="' . $post_type_archive . '" title="' . $post_type_object->labels->name . '">' . $post_type_object->labels->name . '</a></li>';                echo '<li class="separator"> ' . $separator . ' </li>';                          }                          $custom_tax_name = get_queried_object()->name;            echo '<li class="item-current item-archive"><strong class="bread-current bread-archive">' . $custom_tax_name . '</strong></li>';                      } else if ( is_single() ) {                          $post_type = get_post_type();             if($post_type != 'post') {                                  $post_type_object = get_post_type_object($post_type);                $post_type_archive = get_post_type_archive_link($post_type);                              echo '<li class="item-cat item-custom-post-type-' . $post_type . '"><a class="bread-cat bread-custom-post-type-' . $post_type . '" href="' . $post_type_archive . '" title="' . $post_type_object->labels->name . '">' . $post_type_object->labels->name . '</a></li>';                echo '<li class="separator"> ' . $separator . ' </li>';                          }                          // Get post category            $category = get_the_category();                         if(!empty($category)) {                              // Last category post is in                $last_category = $category[count($category) - 1];                                  // Parent any categories and create array                $get_cat_parents = rtrim(get_category_parents($last_category->term_id, true, ','),',');                $cat_parents = explode(',',$get_cat_parents);                                  // Loop through parent categories and store in variable $cat_display                $cat_display = '';                foreach($cat_parents as $parents) {                    $cat_display .= '<li class="item-cat">'.$parents.'</li>';                    $cat_display .= '<li class="separator"> ' . $separator . ' </li>';                }                         }             $taxonomy_exists = taxonomy_exists($tsh_custom_taxonomy);            if(empty($last_category) && !empty($tsh_custom_taxonomy) && $taxonomy_exists) {                                   $taxonomy_terms = get_the_terms( $post->ID, $tsh_custom_taxonomy );                $cat_id         = $taxonomy_terms[0]->term_id;                $cat_nicename   = $taxonomy_terms[0]->slug;                $cat_link       = get_term_link($taxonomy_terms[0]->term_id, $tsh_custom_taxonomy);                $cat_name       = $taxonomy_terms[0]->name;                           }                          // If the post is in a category            if(!empty($last_category)) {                echo $cat_display;                echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>';                              // Post is in a custom taxonomy            } else if(!empty($cat_id)) {                                  echo '<li class="item-cat item-cat-' . $cat_id . ' item-cat-' . $cat_nicename . '"><a class="bread-cat bread-cat-' . $cat_id . ' bread-cat-' . $cat_nicename . '" href="' . $cat_link . '" title="' . $cat_name . '">' . $cat_name . '</a></li>';                echo '<li class="separator"> ' . $separator . ' </li>';                echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>';                          } else {                                  echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '" title="' . get_the_title() . '">' . get_the_title() . '</strong></li>';                              }                      } else if ( is_category() ) {                           // Category page            echo '<li class="item-current item-cat"><strong class="bread-current bread-cat">' . single_cat_title('', false) . '</strong></li>';                       } else if ( is_page() ) {                           // Standard page            if( $post->post_parent ){                                   // Get parents                 $anc = get_post_ancestors( $post->ID );                                   // Get parents order                $anc = array_reverse($anc);                                   // Parent pages                if ( !isset( $parents ) ) $parents = null;                foreach ( $anc as $ancestor ) {                    $parents .= '<li class="item-parent item-parent-' . $ancestor . '"><a class="bread-parent bread-parent-' . $ancestor . '" href="' . get_permalink($ancestor) . '" title="' . get_the_title($ancestor) . '">' . get_the_title($ancestor) . '</a></li>';                    $parents .= '<li class="separator separator-' . $ancestor . '"> ' . $separator . ' </li>';                }                                   // Render parent pages                echo $parents;                                   // Active page                echo '<li class="item-current item-' . $post->ID . '"><strong title="' . get_the_title() . '"> ' . get_the_title() . '</strong></li>';                               } else {                                   // Just display active page if not parents pages                echo '<li class="item-current item-' . $post->ID . '"><strong class="bread-current bread-' . $post->ID . '"> ' . get_the_title() . '</strong></li>';                               }                       } else if ( is_tag() ) { // Tag page                           // Tag information            $term_id        = get_query_var('tag_id');            $taxonomy       = 'post_tag';            $args           = 'include=' . $term_id;            $terms          = get_terms( $taxonomy, $args );            $get_term_id    = $terms[0]->term_id;            $get_term_slug  = $terms[0]->slug;            $get_term_name  = $terms[0]->name;                           // Return tag name            echo '<li class="item-current item-tag-' . $get_term_id . ' item-tag-' . $get_term_slug . '"><strong class="bread-current bread-tag-' . $get_term_id . ' bread-tag-' . $get_term_slug . '">' . $get_term_name . '</strong></li>';                   } elseif ( is_day() ) { // Day archive page                           // Year link            echo '<li class="item-year item-year-' . get_the_time('Y') . '"><a class="bread-year bread-year-' . get_the_time('Y') . '" href="' . get_year_link( get_the_time('Y') ) . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</a></li>';            echo '<li class="separator separator-' . get_the_time('Y') . '"> ' . $separator . ' </li>';                           // Month link            echo '<li class="item-month item-month-' . get_the_time('m') . '"><a class="bread-month bread-month-' . get_the_time('m') . '" href="' . get_month_link( get_the_time('Y'), get_the_time('m') ) . '" title="' . get_the_time('M') . '">' . get_the_time('M') . ' Archives</a></li>';            echo '<li class="separator separator-' . get_the_time('m') . '"> ' . $separator . ' </li>';                           // Day display            echo '<li class="item-current item-' . get_the_time('j') . '"><strong class="bread-current bread-' . get_the_time('j') . '"> ' . get_the_time('jS') . ' ' . get_the_time('M') . ' Archives</strong></li>';                       } else if ( is_month() ) { // Month Archive                           // Year link            echo '<li class="item-year item-year-' . get_the_time('Y') . '"><a class="bread-year bread-year-' . get_the_time('Y') . '" href="' . get_year_link( get_the_time('Y') ) . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</a></li>';            echo '<li class="separator separator-' . get_the_time('Y') . '"> ' . $separator . ' </li>';                           // Month display            echo '<li class="item-month item-month-' . get_the_time('m') . '"><strong class="bread-month bread-month-' . get_the_time('m') . '" title="' . get_the_time('M') . '">' . get_the_time('M') . ' Archives</strong></li>';                       } else if ( is_year() ) { // Display year archive             echo '<li class="item-current item-current-' . get_the_time('Y') . '"><strong class="bread-current bread-current-' . get_the_time('Y') . '" title="' . get_the_time('Y') . '">' . get_the_time('Y') . ' Archives</strong></li>';                       } else if ( is_author() ) { // Author archive                           // Get the author information            global $author;            $userdata = get_userdata( $author );                           // Display author name            echo '<li class="item-current item-current-' . $userdata->user_nicename . '"><strong class="bread-current bread-current-' . $userdata->user_nicename . '" title="' . $userdata->display_name . '">' . 'Author: ' . $userdata->display_name . '</strong></li>';                   } else if ( get_query_var('paged') ) {                           // Paginated archives            echo '<li class="item-current item-current-' . get_query_var('paged') . '"><strong class="bread-current bread-current-' . get_query_var('paged') . '" title="Page ' . get_query_var('paged') . '">'.__('Page') . ' ' . get_query_var('paged') . '</strong></li>';                       } else if ( is_search() ) {                       // Search results page            echo '<li class="item-current item-current-' . get_search_query() . '"><strong class="bread-current bread-current-' . get_search_query() . '" title="Search results for: ' . get_search_query() . '">Search results for: ' . get_search_query() . '</strong></li>';                   } elseif ( is_404() ) {                           // 404 page            echo '<li>' . 'Error 404' . '</li>';        }         echo '</ul>';      }}

将调用代码放到主题模板适当位置比如header.php中：

<?php if (function_exists('tsh_wp_custom_breadcrumbs')) tsh_wp_custom_breadcrumbs(); ?>

配套CSS样式：

#tsh_breadcrumbs .separator{    font-size:20px;    color:#ccc;    font-weight:100;}#tsh_breadcrumbs{    overflow:hidden;    text-align: center;    list-style:none;    margin:11px 0;}#tsh_breadcrumbs li{    margin-right:14px;    display:inline-block;    vertical-align:middle;}