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<?php |
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/** |
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* Plugin Name: Site Breadcrumbs |
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* Plugin URI: http://wordpress.com |
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* Description: Quickly add breadcrumbs to the single view of a hierarchical post type or a hierarchical taxonomy. |
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* Author: Automattic |
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* Version: 1.0 |
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* Author URI: http://wordpress.com |
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* License: GPL2 or later |
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*/ |
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function jetpack_breadcrumbs() { |
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$taxonomy = is_category() ? 'category' : get_query_var( 'taxonomy' ); |
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$is_taxonomy_hierarchical = is_taxonomy_hierarchical( $taxonomy ); |
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$post_type = is_page() ? 'page' : get_query_var( 'post_type' ); |
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$is_post_type_hierarchical = is_post_type_hierarchical( $post_type ); |
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if ( ! ( $is_post_type_hierarchical || $is_taxonomy_hierarchical ) || is_front_page() ) { |
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return; |
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} |
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$breadcrumb = ''; |
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if ( $is_post_type_hierarchical ) { |
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$post_id = get_queried_object_id(); |
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$ancestors = array_reverse( get_post_ancestors( $post_id ) ); |
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if ( $ancestors ) { |
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foreach ( $ancestors as $ancestor ) { |
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$breadcrumb .= '<span itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a href="' . esc_url( get_permalink( $ancestor ) ) . '" itemprop="item"><span itemprop="name">' . esc_html( get_the_title( $ancestor ) ) . '</span></a></span>'; |
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} |
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} |
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$breadcrumb .= '<span class="current-page" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><span itemprop="name">' . esc_html( get_the_title( $post_id ) ) . '</span></span>'; |
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} elseif ( $is_taxonomy_hierarchical ) { |
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$current = get_term( get_queried_object_id(), $taxonomy ); |
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if ( is_wp_error( $current ) ) { |
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return; |
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} |
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if ( $current->parent ) { |
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$breadcrumb = jetpack_get_term_parents( $current->parent, $taxonomy ); |
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} |
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$breadcrumb .= '<span class="current-category" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><span itemprop="name">' . esc_html( $current->name ) . '</span></span>'; |
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} |
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$home = '<span itemprop="itemListElement" itemscope itemtype="http://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>'; |
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echo '<nav class="entry-breadcrumbs" itemscope itemtype="http://schema.org/BreadcrumbList">' . $home . $breadcrumb . '</nav>'; |
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} |
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/** |
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* Return the parents for a given taxonomy term ID. |
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* |
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* @param int $term Taxonomy term whose parents will be returned. |
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* @param string $taxonomy Taxonomy name that the term belongs to. |
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* @param array $visited Terms already added to prevent duplicates. |
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* |
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* @return string A list of links to the term parents. |
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*/ |
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function jetpack_get_term_parents( $term, $taxonomy, $visited = array() ) { |
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$parent = get_term( $term, $taxonomy ); |
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if ( is_wp_error( $parent ) ) { |
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return $parent; |
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} |
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$chain = ''; |
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if ( $parent->parent && ( $parent->parent != $parent->term_id ) && ! in_array( $parent->parent, $visited ) ) { |
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$visited[] = $parent->parent; |
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$chain .= jetpack_get_term_parents( $parent->parent, $taxonomy, $visited ); |
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} |
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$chain .= '<a href="' . esc_url( get_category_link( $parent->term_id ) ) . '">' . $parent->name . '</a>'; |
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return $chain; |
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} |
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Automattic /
jetpack
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.