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<?php /** * Plugin Name: Site Breadcrumbs * Plugin URI: https://wordpress.com * Description: Quickly add breadcrumbs to the single view of a hierarchical post type or a hierarchical taxonomy. * Author: Automattic * Version: 1.0 * Author URI: https://wordpress.com * License: GPL2 or later */
function jetpack_breadcrumbs() { $taxonomy = is_category() ? 'category' : get_query_var( 'taxonomy' ); $is_taxonomy_hierarchical = is_taxonomy_hierarchical( $taxonomy );
$post_type = is_page() ? 'page' : get_query_var( 'post_type' ); $is_post_type_hierarchical = is_post_type_hierarchical( $post_type );
if ( ! ( $is_post_type_hierarchical || $is_taxonomy_hierarchical ) || is_front_page() ) { return; }
$breadcrumb = '';
if ( $is_post_type_hierarchical ) { $post_id = get_queried_object_id(); $ancestors = array_reverse( get_post_ancestors( $post_id ) ); if ( $ancestors ) { foreach ( $ancestors as $ancestor ) { $breadcrumb .= '<span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="' . esc_url( get_permalink( $ancestor ) ) . '" itemprop="item"><span itemprop="name">' . esc_html( get_the_title( $ancestor ) ) . '</span></a></span>'; } } $breadcrumb .= '<span class="current-page" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><span itemprop="name">' . esc_html( get_the_title( $post_id ) ) . '</span></span>'; } elseif ( $is_taxonomy_hierarchical ) { $current = get_term( get_queried_object_id(), $taxonomy );
if ( is_wp_error( $current ) ) { return; }
if ( $current->parent ) { $breadcrumb = jetpack_get_term_parents( $current->parent, $taxonomy ); }
$breadcrumb .= '<span class="current-category" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><span itemprop="name">' . esc_html( $current->name ) . '</span></span>'; }
$home = '<span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="' . esc_url( home_url( '/' ) ) . '" class="home-link" itemprop="item" rel="home"><span itemprop="name">' . esc_html__( 'Home', 'jetpack' ) . '</span></a></span>';
echo '<nav class="entry-breadcrumbs" itemscope itemtype="https://schema.org/BreadcrumbList">' . $home . $breadcrumb . '</nav>'; }
/** * Return the parents for a given taxonomy term ID. * * @param int $term Taxonomy term whose parents will be returned. * @param string $taxonomy Taxonomy name that the term belongs to. * @param array $visited Terms already added to prevent duplicates. * * @return string A list of links to the term parents. */ function jetpack_get_term_parents( $term, $taxonomy, $visited = array() ) { $parent = get_term( $term, $taxonomy );
if ( is_wp_error( $parent ) ) { return $parent; }
$chain = '';
if ( $parent->parent && ( $parent->parent != $parent->term_id ) && ! in_array( $parent->parent, $visited ) ) { $visited[] = $parent->parent; $chain .= jetpack_get_term_parents( $parent->parent, $taxonomy, $visited ); }
$chain .= '<a href="' . esc_url( get_category_link( $parent->term_id ) ) . '">' . $parent->name . '</a>';
return $chain; }
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