自定义代码实现面包屑
将以下代码添加到现用主题的functions.php文件中：
// WordPress Breadcrumb Function
// Add this code into your theme function file.
function ah_breadcrumb() {
// Check if is front/home page, return
if ( is_front_page() ) {
return;
}
// Define
global $post;
$custom_taxonomy = ''; // If you have custom taxonomy place it here
$defaults = array(
'seperator' => '»',
'id' => 'ah-breadcrumb',
'classes' => 'ah-breadcrumb',
'home_title' => esc_html__( 'Home', '' )
);
$sep = '<li class="seperator">'. esc_html( $defaults['seperator'] ) .'</li>';
// Start the breadcrumb with a link to your homepage
echo '<ul id="'. esc_attr( $defaults['id'] ) .'" class="'. esc_attr( $defaults['classes'] ) .'">';
// Creating home link
echo '<li class="item"><a href="'. get_home_url() .'">'. esc_html( $defaults['home_title'] ) .'</a></li>' . $sep;
if ( is_single() ) {
// Get posts type
$post_type = get_post_type();
// If post type is not post
if( $post_type != 'post' ) {
$post_type_object = get_post_type_object( $post_type );
$post_type_link = get_post_type_archive_link( $post_type );
echo '<li class="item item-cat"><a href="'. $post_type_link .'">'. $post_type_object->labels->name .'</a></li>'. $sep;
}
// Get categories
$category = get_the_category( $post->ID );
// If category not empty
if( !empty( $category ) ) {
// Arrange category parent to child
$category_values = array_values( $category );
$get_last_category = end( $category_values );
// $get_last_category = $category[count($category) - 1];
$get_parent_category = rtrim( get_category_parents( $get_last_category->term_id, true, ',' ), ',' );
$cat_parent = explode( ',', $get_parent_category );
// Store category in $display_category
$display_category = '';
foreach( $cat_parent as $p ) {
$display_category .= '<li class="item item-cat">'. $p .'</li>' . $sep;
}
}
// If it's a custom post type within a custom taxonomy
$taxonomy_exists = taxonomy_exists( $custom_taxonomy );
if( empty( $get_last_category ) && !empty( $custom_taxonomy ) && $taxonomy_exists ) {
$taxonomy_terms = get_the_terms( $post->ID, $custom_taxonomy );
$cat_id = $taxonomy_terms[0]->term_id;
$cat_link = get_term_link($taxonomy_terms[0]->term_id, $custom_taxonomy);
$cat_name = $taxonomy_terms[0]->name;
}
// Check if the post is in a category
if( !empty( $get_last_category ) ) {
echo $display_category;
echo '<li class="item item-current">'. get_the_title() .'</li>';
} else if( !empty( $cat_id ) ) {
echo '<li class="item item-cat"><a href="'. $cat_link .'">'. $cat_name .'</a></li>' . $sep;
echo '<li class="item-current item">'. get_the_title() .'</li>';
} else {
echo '<li class="item-current item">'. get_the_title() .'</li>';
}
} else if( is_archive() ) {
if( is_tax() ) {
// Get posts type
$post_type = get_post_type();
// If post type is not post
if( $post_type != 'post' ) {
$post_type_object = get_post_type_object( $post_type );
$post_type_link = get_post_type_archive_link( $post_type );
echo '<li class="item item-cat item-custom-post-type-' . $post_type . '"><a href="' . $post_type_link . '">' . $post_type_object->labels->name . '</a></li>' . $sep;
}
$custom_tax_name = get_queried_object()->name;
echo '<li class="item item-current">'. $custom_tax_name .'</li>';
} else if ( is_category() ) {
$parent = get_queried_object()->category_parent;
if ( $parent !== 0 ) {
$parent_category = get_category( $parent );
$category_link = get_category_link( $parent );
echo '<li class="item"><a href="'. esc_url( $category_link ) .'">'. $parent_category->name .'</a></li>' . $sep;
}
echo '<li class="item item-current">'. single_cat_title( '', false ) .'</li>';
} else if ( is_tag() ) {
// Get tag information
$term_id = get_query_var('tag_id');
$taxonomy = 'post_tag';
$args = 'include=' . $term_id;
$terms = get_terms( $taxonomy, $args );
$get_term_name = $terms[0]->name;
// Display the tag name
echo '<li class="item-current item">'. $get_term_name .'</li>';
} else if( is_day() ) {
// Day archive
// Year link
echo '<li class="item-year item"><a href="'. get_year_link( get_the_time('Y') ) .'">'. get_the_time('Y') . ' Archives</a></li>' . $sep;
// Month link
echo '<li class="item-month item"><a href="'. get_month_link( get_the_time('Y'), get_the_time('m') ) .'">'. get_the_time('M') .' Archives</a></li>' . $sep;
// Day display
echo '<li class="item-current item">'. get_the_time('jS') .' '. get_the_time('M'). ' Archives</li>';
} else if( is_month() ) {
// Month archive
// Year link
echo '<li class="item-year item"><a href="'. get_year_link( get_the_time('Y') ) .'">'. get_the_time('Y') . ' Archives</a></li>' . $sep;
// Month Display
echo '<li class="item-month item-current item">'. get_the_time('M') .' Archives</li>';
} else if ( is_year() ) {
// Year Display
echo '<li class="item-year item-current item">'. get_the_time('Y') .' Archives</li>';
} else if ( is_author() ) {
// Auhor archive
// Get the author information
global $author;
$userdata = get_userdata( $author );
// Display author name
echo '<li class="item-current item">'. 'Author: '. $userdata->display_name . '</li>';
} else {
echo '<li class="item item-current">'. post_type_archive_title() .'</li>';
}
} else if ( is_page() ) {
// Standard page
if( $post->post_parent ) {
// If child page, get parents
$anc = get_post_ancestors( $post->ID );
// Get parents in the right order
$anc = array_reverse( $anc );
// Parent page loop
if ( !isset( $parents ) ) $parents = null;
foreach ( $anc as $ancestor ) {
$parents .= '<li class="item-parent item"><a href="'. get_permalink( $ancestor ) .'">'. get_the_title( $ancestor ) .'</a></li>' . $sep;
}
// Display parent pages
echo $parents;
// Current page
echo '<li class="item-current item">'. get_the_title() .'</li>';
} else {
// Just display current page if not parents
echo '<li class="item-current item">'. get_the_title() .'</li>';
}
} else if ( is_search() ) {
// Search results page
echo '<li class="item-current item">Search results for: '. get_search_query() .'</li>';
} else if ( is_404() ) {
// 404 page
echo '<li class="item-current item">' . 'Error 404' . '</li>';
}
// End breadcrumb
echo '</ul>';
}然后，您还需要将以下行添加到主题的header.php文件中：
<?php
// Call the breadcrumb function where you want to display
if ( function_exists('ah_breadcrumb') ) ah_breadcrumb();
?>