下面由wordpress教程栏目给大家分享一个wordpress面包屑导航代码，希望对需要的朋友有所帮助！
转载分享一段WordPress面包屑导航代码，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。
将代码添加到当前主题函数模板functions.php中：
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/**
* 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;
} 
