/
breadcrumb-trail.php
1217 lines (958 loc) · 40 KB
/
breadcrumb-trail.php
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<?php
/**
* Breadcrumb Trail - A breadcrumb menu script for WordPress.
*
* Breadcrumb Trail is a script for showing a breadcrumb trail for any type of page. It tries to
* anticipate any type of structure and display the best possible trail that matches your site's
* permalink structure. While not perfect, it attempts to fill in the gaps left by many other
* breadcrumb scripts.
*
* This program is free software; you can redistribute it and/or modify it under the terms of the GNU
* General Public License as published by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* @package BreadcrumbTrail
* @version 0.6.0
* @author Justin Tadlock <justin@justintadlock.com>
* @copyright Copyright (c) 2008 - 2013, Justin Tadlock
* @link http://themehybrid.com/plugins/breadcrumb-trail
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*/
/**
* Shows a breadcrumb for all types of pages. This is a wrapper function for the Breadcrumb_Trail class,
* which should be used in theme templates.
*
* @since 0.1.0
* @access public
* @param array $args Arguments to pass to Breadcrumb_Trail.
* @return void
*/
function breadcrumb_trail( $args = array() ) {
if ( function_exists( 'is_bbpress' ) && is_bbpress() )
$breadcrumb = new bbPress_Breadcrumb_Trail( $args );
else
$breadcrumb = new Breadcrumb_Trail( $args );
$breadcrumb->trail();
}
/**
* Creates a breadcrumbs menu for the site based on the current page that's being viewed by the user.
*
* @since 0.6.0
*/
class Breadcrumb_Trail {
/**
* Array of items belonging to the current breadcrumb trail.
*
* @since 0.1.0
* @access public
* @var array
*/
public $items = array();
/**
* Arguments used to build the breadcrumb trail.
*
* @since 0.1.0
* @access public
* @var array
*/
public $args = array();
/**
* Sets up the breadcrumb trail.
*
* @since 0.6.0
* @access public
* @param array $args The arguments for how to build the breadcrumb trail.
* @return void
*/
public function __construct( $args = array() ) {
/* Remove the bbPress breadcrumbs. */
add_filter( 'bbp_get_breadcrumb', '__return_false' );
$defaults = array(
'container' => 'div',
'separator' => '/',
'before' => '',
'after' => '',
'show_on_front' => true,
'network' => false,
//'show_edit_link' => false,
'show_title' => true,
'show_browse' => true,
'echo' => true,
/* Post taxonomy (examples follow). */
'post_taxonomy' => array(
// 'post' => 'post_tag',
// 'book' => 'genre',
),
/* Labels for text used (see Breadcrumb_Trail::default_labels). */
'labels' => array()
);
$this->args = apply_filters( 'breadcrumb_trail_args', wp_parse_args( $args, $defaults ) );
/* Merge the user-added labels with the defaults. */
$this->args['labels'] = wp_parse_args( $this->args['labels'], $this->default_labels() );
$this->do_trail_items();
}
/**
* Formats and outputs the breadcrumb trail.
*
* @since 0.6.0
* @access public
* @return string
*/
public function trail() {
$breadcrumb = '';
/* Connect the breadcrumb trail if there are items in the trail. */
if ( !empty( $this->items ) && is_array( $this->items ) ) {
/* Open the breadcrumb trail containers. */
$breadcrumb = "\n\t\t" . '<' . tag_escape( $this->args['container'] ) . ' class="breadcrumb-trail breadcrumbs" itemprop="breadcrumb">';
/* If $before was set, wrap it in a container. */
$breadcrumb .= ( !empty( $this->args['before'] ) ? "\n\t\t\t" . '<span class="trail-before">' . $this->args['before'] . '</span> ' . "\n\t\t\t" : '' );
/* Add 'browse' label if it should be shown. */
if ( true === $this->args['show_browse'] )
$breadcrumb .= "\n\t\t\t" . '<span class="trail-browse">' . $this->args['labels']['browse'] . '</span> ';
/* Adds the 'trail-begin' class around first item if there's more than one item. */
if ( 1 < count( $this->items ) )
array_unshift( $this->items, '<span class="trail-begin">' . array_shift( $this->items ) . '</span>' );
/* Adds the 'trail-end' class around last item. */
array_push( $this->items, '<span class="trail-end">' . array_pop( $this->items ) . '</span>' );
/* Format the separator. */
$separator = ( !empty( $this->args['separator'] ) ? '<span class="sep">' . $this->args['separator'] . '</span>' : '<span class="sep">/</span>' );
/* Join the individual trail items into a single string. */
$breadcrumb .= join( "\n\t\t\t {$separator} ", $this->items );
/* If $after was set, wrap it in a container. */
$breadcrumb .= ( !empty( $this->args['after'] ) ? "\n\t\t\t" . ' <span class="trail-after">' . $this->args['after'] . '</span>' : '' );
/* Close the breadcrumb trail containers. */
$breadcrumb .= "\n\t\t" . '</' . tag_escape( $this->args['container'] ) . '>';
}
/* Allow developers to filter the breadcrumb trail HTML. */
$breadcrumb = apply_filters( 'breadcrumb_trail', $breadcrumb, $this->args );
if ( true === $this->args['echo'] )
echo $breadcrumb;
else
return $breadcrumb;
}
/**
* Returns an array of the default labels.
*
* @since 0.6.0
* @access public
* @return array
*/
public function default_labels() {
$labels = array(
'browse' => __( 'Browse:', 'breadcrumb-trail' ),
'home' => __( 'Home', 'breadcrumb-trail' ),
'search' => __( 'Search results for "%s"', 'breadcrumb-trail' ),
'error_404' => __( '404 Not Found', 'breadcrumb-trail' ),
'paged' => __( 'Page %d', 'breadcrumb-trail' ),
'archives' => __( 'Archives', 'breadcrumb-trail' ),
'archive_minute_hour' => __( 'g:i a', 'breadcrumb-trail' ),
'archive_minute' => __( 'Minute %d', 'breadcrumb-trail' ),
'archive_hour' => __( 'g a', 'breadcrumb-trail' ),
'archive_day' => __( 'd', 'breadcrumb-trail' ),
'archive_week' => __( 'Week %d', 'breadcrumb-trail' ),
'archive_month' => __( 'F', 'breadcrumb-trail' ),
'archive_year' => __( 'Y', 'breadcrumb-trail' ),
// 'edit' => __( 'Edit', 'breadcrumb-trail' ), // @todo Implement edit link
);
return $labels;
}
/**
* Runs through the various WordPress conditional tags to check the current page being viewed. Once
* a condition is met, a specific method is launched to add items to the $items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_trail_items() {
/* If viewing the front page. */
if ( is_front_page() ) {
$this->do_front_page_items();
}
/* If not viewing the front page. */
else {
/* Add the network and site home links. */
$this->do_network_home_link();
$this->do_site_home_link();
/* If viewing the home/blog page. */
if ( is_home() ) {
$this->do_posts_page_items();
}
/* If viewing a single post. */
elseif ( is_singular() ) {
$this->do_singular_items();
}
/* If viewing an archive page. */
elseif ( is_archive() ) {
if ( is_post_type_archive() )
$this->do_post_type_archive_items();
elseif ( is_category() || is_tag() || is_tax() )
$this->do_term_archive_items();
elseif ( is_author() )
$this->do_user_archive_items();
elseif ( get_query_var( 'minute' ) && get_query_var( 'hour' ) )
$this->do_minute_hour_archive_items();
elseif ( get_query_var( 'minute' ) )
$this->do_minute_archive_items();
elseif ( get_query_var( 'hour' ) )
$this->do_hour_archive_items();
elseif ( is_day() )
$this->do_day_archive_items();
elseif ( get_query_var( 'w' ) )
$this->do_week_archive_items();
elseif ( is_month() )
$this->do_month_archive_items();
elseif ( is_year() )
$this->do_year_archive_items();
else
$this->do_default_archive_items();
}
/* If viewing a search results page. */
elseif ( is_search() ) {
$this->do_search_items();
}
/* If viewing the 404 page. */
elseif ( is_404() ) {
$this->do_404_items();
}
}
/* Add paged items if they exist. */
$this->do_paged_items();
/* Allow developers to overwrite the items for the breadcrumb trail. */
$this->items = apply_filters( 'breadcrumb_trail_items', $this->items, $this->args );
}
/**
* Gets front items based on $wp_rewrite->front.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_rewrite_front_items() {
global $wp_rewrite;
if ( $wp_rewrite->front )
$this->do_path_parents( $wp_rewrite->front );
}
/**
* Adds the page/paged number to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_paged_items() {
/* If viewing a paged singular post. */
if ( is_singular() && 1 < get_query_var( 'page' ) && true === $this->args['show_title'] )
$this->items[] = sprintf( $this->args['labels']['paged'], absint( get_query_var( 'page' ) ) );
/* If viewing a paged archive-type page. */
elseif ( is_paged() && true === $this->args['show_title'] )
$this->items[] = sprintf( $this->args['labels']['paged'], absint( get_query_var( 'paged' ) ) );
}
/**
* Adds the network (all sites) home page link to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_network_home_link() {
if ( is_multisite() && !is_main_site() && true === $this->args['network'] )
$this->items[] = '<a href="' . network_home_url() . '" title="' . esc_attr( $this->args['labels']['home'] ) . '">' . $this->args['labels']['home'] . '</a>';
}
/**
* Adds the current site's home page link to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_site_home_link() {
$label = ( is_multisite() && !is_main_site() && true === $this->args['network'] ) ? get_bloginfo( 'name' ) : $this->args['labels']['home'];
$this->items[] = '<a href="' . home_url() . '" title="' . esc_attr( get_bloginfo( 'name' ) ) . '">' . $label . '</a>';
}
/**
* Adds items for the front page to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_front_page_items() {
/* Only show front items if the 'show_on_front' argument is set to 'true'. */
if ( true === $this->args['show_on_front'] ) {
/* If on a paged view, add the home link items. */
if ( is_paged() ) {
$this->do_network_home_link();
$this->do_site_home_link();
}
/* If on the main front page, add the network home link item and the home item. */
else {
$this->do_network_home_link();
if ( true === $this->args['show_title'] )
$this->items[] = ( is_multisite() && true === $this->args['network'] ) ? get_bloginfo( 'name' ) : $this->args['labels']['home'];
}
}
}
/**
* Adds items for the posts page (i.e., is_home()) to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_posts_page_items() {
/* Get the post ID and post. */
$post_id = get_queried_object_id();
$post = get_page( $post_id );
/* If the post has parents, add them to the trail. */
if ( 0 < $post->post_parent )
$this->do_post_parents( $post->post_parent );
/* Get the page title. */
$title = get_the_title( $post_id );
/* Add the posts page item. */
if ( is_paged() )
$this->items[] = '<a href="' . get_permalink( $post_id ) . '" title="' . esc_attr( $title ) . '">' . $title . '</a>';
elseif ( $title && true === $this->args['show_title'] )
$this->items[] = $title;
}
/**
* Adds singular post items to the items array.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_singular_items() {
/* Get the queried post. */
$post = get_queried_object();
$post_id = get_queried_object_id();
/* If the post has a parent, follow the parent trail. */
if ( 0 < $post->post_parent )
$this->do_post_parents( $post->post_parent );
/* If the post doesn't have a parent, get its hierarchy based off the post type. */
else
$this->do_post_hierarchy( $post_id );
/* Display terms for specific post type taxonomy if requested. */
$this->do_post_terms( $post_id );
/* End with the post title. */
if ( $post_title = single_post_title( '', false ) ) {
if ( 1 < get_query_var( 'page' ) )
$this->items[] = '<a href="' . get_permalink( $post_id ) . '" title="' . esc_attr( $post_title ) . '">' . $post_title . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = $post_title;
}
}
/**
* Adds a specific post's parents to the items array.
*
* @since 0.6.0
* @access public
* @param int $post_id The ID of the post to get the parents of.
* @return void
*/
public function do_post_parents( $post_id ) {
$parents = array();
while ( $post_id ) {
/* Get the post by ID. */
$post = get_post( $post_id );
/* Add the formatted post link to the array of parents. */
$parents[] = '<a href="' . get_permalink( $post_id ) . '" title="' . esc_attr( get_the_title( $post_id ) ) . '">' . get_the_title( $post_id ) . '</a>';
/* If there's no longer a post parent, brea out of the loop. */
if ( 0 >= $post->post_parent )
break;
/* Change the post ID to the parent post to continue looping. */
$post_id = $post->post_parent;
}
/* Get the post hierarchy based off the final parent post. */
$this->do_post_hierarchy( $post_id );
/* Merge the parent items into the items array. */
$this->items = array_merge( $this->items, array_reverse( $parents ) );
}
/**
* Adds a post's terms from a specific taxonomy to the items array.
*
* @since 0.6.0
* @access public
* @param int $post_id The ID of the post to get the terms for.
* @return void
*/
public function do_post_terms( $post_id ) {
/* Get the post type. */
$post_type = get_post_type( $post_id );
/* Add the terms of the taxonomy for this post. */
if ( !empty( $this->args['post_taxonomy'][ $post_type ] ) )
$this->items[] = get_the_term_list( $post_id, $this->args['post_taxonomy'][ $post_type ], '', ', ', '' );
}
/**
* Adds a specific post's hierarchy to the items array. The hierarchy is determined by post type's
* rewrite arguments and whether it has an archive page.
*
* @since 0.6.0
* @access public
* @param int $post_id The ID of the post to get the hierarchy for.
* @return void
*/
public function do_post_hierarchy( $post_id ) {
/* Get the post type. */
$post_type = get_post_type( $post_id );
$post_type_object = get_post_type_object( $post_type );
/* If this is the 'post' post type, get the rewrite front items and map the rewrite tags. */
if ( 'post' === $post_type ) {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Map the rewrite tags. */
$this->map_rewrite_tags( $post_id, get_option( 'permalink_structure' ) );
}
/* If the post type has rewrite rules. */
elseif ( false !== $post_type_object->rewrite ) {
/* If 'with_front' is true, add $wp_rewrite->front to the trail. */
if ( $post_type_object->rewrite['with_front'] )
$this->do_rewrite_front_items();
/* If there's a path, check for parents. */
if ( !empty( $post_type_object->rewrite['slug'] ) )
$this->do_path_parents( $post_type_object->rewrite['slug'] );
}
/* If there's an archive page, add it to the trail. */
if ( !empty( $post_type_object->has_archive ) ) {
/* Add support for a non-standard label of 'archive_title' (special use case). */
$label = !empty( $post_type_object->labels->archive_title ) ? $post_type_object->labels->archive_title : $post_type_object->labels->name;
$this->items[] = '<a href="' . get_post_type_archive_link( $post_type ) . '" title="' . esc_attr( $label ) . '">' . $label . '</a>';
}
}
/**
* Gets post types by slug. This is needed because the get_post_types() function doesn't exactly
* match the 'has_archive' argument when it's set as a string instead of a boolean.
*
* @since 0.6.0
* @access public
* @param int $slug The post type archive slug to search for.
* @return void
*/
public function get_post_types_by_slug( $slug ) {
$return = array();
$post_types = get_post_types( array(), 'objects' );
foreach ( $post_types as $type ) {
if ( $slug === $type->has_archive || ( true === $type->has_archive && $slug === $type->rewrite['slug'] ) )
$return[] = $type;
}
return $return;
}
/**
* Adds the items to the trail items array for taxonomy term archives.
*
* @since 0.6.0
* @access public
* @global object $wp_rewrite
* @return void
*/
public function do_term_archive_items() {
global $wp_rewrite;
/* Get some taxonomy and term variables. */
$term = get_queried_object();
$taxonomy = get_taxonomy( $term->taxonomy );
/* If there are rewrite rules for the taxonomy. */
if ( false !== $taxonomy->rewrite ) {
/* If 'with_front' is true, dd $wp_rewrite->front to the trail. */
if ( $taxonomy->rewrite['with_front'] && $wp_rewrite->front )
$this->do_rewrite_front_items();
/* Get parent pages by path if they exist. */
$this->do_path_parents( $taxonomy->rewrite['slug'] );
/* Add post type archive if its 'has_archive' matches the taxonomy rewrite 'slug'. */
if ( $taxonomy->rewrite['slug'] ) {
$slug = trim( $taxonomy->rewrite['slug'], '/' );
/**
* Deals with the situation if the slug has a '/' between multiple strings. For
* example, "movies/genres" where "movies" is the post type archive.
*/
$matches = explode( '/', $slug );
/* If matches are found for the path. */
if ( isset( $matches ) ) {
/* Reverse the array of matches to search for posts in the proper order. */
$matches = array_reverse( $matches );
/* Loop through each of the path matches. */
foreach ( $matches as $match ) {
/* If a match is found. */
$slug = $match;
/* Get public post types that match the rewrite slug. */
$post_types = $this->get_post_types_by_slug( $match );
if ( !empty( $post_types ) ) {
$post_type_object = $post_types[0];
/* Add support for a non-standard label of 'archive_title' (special use case). */
$label = !empty( $post_type_object->labels->archive_title ) ? $post_type_object->labels->archive_title : $post_type_object->labels->name;
/* Add the post type archive link to the trail. */
$this->items[] = '<a href="' . get_post_type_archive_link( $post_type_object->name ) . '" title="' . esc_attr( $label ) . '">' . $label . '</a>';
/* Break out of the loop. */
break;
}
}
}
}
}
/* If the taxonomy is hierarchical, list its parent terms. */
if ( is_taxonomy_hierarchical( $term->taxonomy ) && $term->parent )
$this->do_term_parents( $term->parent, $term->taxonomy );
/* Add the term name to the trail end. */
if ( is_paged() )
$this->items[] = '<a href="' . esc_url( get_term_link( $term, $term->taxonomy ) ) . '" title="' . esc_attr( single_term_title( '', false ) ) . '">' . single_term_title( '', false ) . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = single_term_title( '', false );
}
/**
* Adds the items to the trail items array for post type archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_post_type_archive_items() {
/* Get the post type object. */
$post_type_object = get_post_type_object( get_query_var( 'post_type' ) );
if ( false !== $post_type_object->rewrite ) {
/* If 'with_front' is true, add $wp_rewrite->front to the trail. */
if ( $post_type_object->rewrite['with_front'] )
$this->do_rewrite_front_items();
/* If there's a rewrite slug, check for parents. */
if ( !empty( $post_type_object->rewrite['slug'] ) )
$this->do_path_parents( $post_type_object->rewrite['slug'] );
}
/* Add the post type [plural] name to the trail end. */
if ( is_paged() )
$this->items[] = '<a href="' . esc_url( get_post_type_archive_link( $post_type_object->name ) ) . '" title="' . esc_attr( post_type_archive_title( '', false ) ) . '">' . post_type_archive_title( '', false ) . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = post_type_archive_title( '', false );
}
/**
* Adds the items to the trail items array for user (author) archives.
*
* @since 0.6.0
* @access public
* @global object $wp_rewrite
* @return void
*/
public function do_user_archive_items() {
global $wp_rewrite;
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Get the user ID. */
$user_id = get_query_var( 'author' );
/* If $author_base exists, check for parent pages. */
if ( !empty( $wp_rewrite->author_base ) )
$this->do_path_parents( $wp_rewrite->author_base );
/* Add the author's display name to the trail end. */
if ( is_paged() )
$this->items[] = '<a href="'. esc_url( get_author_posts_url( $user_id ) ) . '" title="' . esc_attr( get_the_author_meta( 'display_name', $user_id ) ) . '">' . get_the_author_meta( 'display_name', $user_id ) . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = get_the_author_meta( 'display_name', $user_id );
}
/**
* Adds the items to the trail items array for minute + hour archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_minute_hour_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Add the minute + hour item. */
if ( true === $this->args['show_title'] )
$this->items[] = get_the_time( $this->args['labels']['archive_minute_hour'] );
}
/**
* Adds the items to the trail items array for minute archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_minute_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Add the minute item. */
if ( true === $this->args['show_title'] )
$this->items[] = sprintf( $this->args['labels']['archive_minute'], date_i18n( 'i', get_the_time( 'U' ) ) );
}
/**
* Adds the items to the trail items array for hour archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_hour_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Add the hour item. */
if ( true === $this->args['show_title'] )
$this->items[] = get_the_time( $this->args['labels']['archive_hour'] );
}
/**
* Adds the items to the trail items array for day archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_day_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Get year, month, and day. */
$year = get_the_time( $this->args['labels']['archive_year'] );
$month = get_the_time( $this->args['labels']['archive_month'] );
$day = get_the_time( $this->args['labels']['archive_day'] );
/* Add the year and month items. */
$this->items[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . esc_attr( $year ) . '">' . $year . '</a>';
$this->items[] = '<a href="' . get_month_link( get_the_time( 'Y' ), get_the_time( 'm' ) ) . '" title="' . esc_attr( $month ) . '">' . $month . '</a>';
/* Add the day item. */
if ( is_paged() )
$this->items[] = '<a href="' . get_day_link( get_the_time( 'Y' ), get_the_time( 'm' ), get_the_time( 'd' ) ) . '" title="' . esc_attr( $day ) . '">' . $day . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = $day;
}
/**
* Adds the items to the trail items array for week archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_week_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Get the year and week. */
$year = get_the_time( $this->args['labels']['archive_year'] );
$week = sprintf( $this->args['labels']['archive_week'], date_i18n( 'W', get_the_time( 'U' ) ) );
/* Add the year item. */
$this->items[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . esc_attr( $year ) . '">' . $year . '</a>';
/* Add the week item. */
if ( is_paged() )
$this->items[] = get_archives_link( add_query_arg( array( 'm' => get_the_time( 'Y' ), 'w' => get_the_time( 'W' ) ), home_url() ), $week, false );
elseif ( true === $this->args['show_title'] )
$this->items[] = $week;
}
/**
* Adds the items to the trail items array for month archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_month_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Get the year and month. */
$year = get_the_time( $this->args['labels']['archive_year'] );
$month = get_the_time( $this->args['labels']['archive_month'] );
/* Add the year item. */
$this->items[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . esc_attr( $year ) . '">' . $year . '</a>';
/* Add the month item. */
if ( is_paged() )
$this->items[] = '<a href="' . get_month_link( get_the_time( 'Y' ), get_the_time( 'm' ) ) . '" title="' . esc_attr( $month ) . '">' . $month . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = $month;
}
/**
* Adds the items to the trail items array for year archives.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_year_archive_items() {
/* Add $wp_rewrite->front to the trail. */
$this->do_rewrite_front_items();
/* Get the year. */
$year = get_the_time( $this->args['labels']['archive_year'] );
/* Add the year item. */
if ( is_paged() )
$this->items[] = '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '" title="' . esc_attr( $year ) . '">' . $year . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = $year;
}
/**
* Adds the items to the trail items array for archives that don't have a more specific method
* defined in this class.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_default_archive_items() {
/* If this is a date-/time-based archive, add $wp_rewrite->front to the trail. */
if ( is_date() || is_time() )
$this->do_rewrite_front_items();
if ( true === $this->args['show_title'] )
$this->items[] = $this->args['labels']['archives'];
}
/**
* Adds the items to the trail items array for search results.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_search_items() {
if ( is_paged() )
$this->items[] = '<a href="' . get_search_link() . '" title="' . esc_attr( sprintf( $this->args['labels']['search'], get_search_query() ) ) . '">' . sprintf( $this->args['labels']['search'], get_search_query() ) . '</a>';
elseif ( true === $this->args['show_title'] )
$this->items[] = sprintf( $this->args['labels']['search'], get_search_query() );
}
/**
* Adds the items to the trail items array for 404 pages.
*
* @since 0.6.0
* @access public
* @return void
*/
public function do_404_items() {
if ( true === $this->args['show_title'] )
$this->items[] = $this->args['labels']['error_404'];
}
/**
* Get parent posts by path. Currently, this method only supports getting parents of the 'page'
* post type. The goal of this function is to create a clear path back to home given what would
* normally be a "ghost" directory. If any page matches the given path, it'll be added.
*
* @since 0.6.0
* @access public
* @param string $path The path (slug) to search for posts by.
* @return void
*/
function do_path_parents( $path ) {
/* Trim '/' off $path in case we just got a simple '/' instead of a real path. */
$path = trim( $path, '/' );
/* If there's no path, return. */
if ( empty( $path ) )
return;
/* Get parent post by the path. */
$post = get_page_by_path( $path );
if ( !empty( $post ) ) {
$this->do_post_parents( $post->ID );
}
elseif ( is_null( $post ) ) {
/* Separate post names into separate paths by '/'. */
$path = trim( $path, '/' );
preg_match_all( "/\/.*?\z/", $path, $matches );
/* If matches are found for the path. */
if ( isset( $matches ) ) {
/* Reverse the array of matches to search for posts in the proper order. */
$matches = array_reverse( $matches );
/* Loop through each of the path matches. */
foreach ( $matches as $match ) {
/* If a match is found. */
if ( isset( $match[0] ) ) {
/* Get the parent post by the given path. */
$path = str_replace( $match[0], '', $path );
$post = get_page_by_path( trim( $path, '/' ) );
/* If a parent post is found, set the $post_id and break out of the loop. */
if ( !empty( $post ) && 0 < $post->ID ) {
$this->do_post_parents( $post->ID );
break;
}
}
}
}
}
}
/**
* Searches for term parents of hierarchical taxonomies. This function is similar to the WordPress
* function get_category_parents() but handles any type of taxonomy.
*
* @since 0.6.0
* @param int $term_id ID of the term to get the parents of.
* @param string $taxonomy Name of the taxonomy for the given term.
* @return void
*/
function do_term_parents( $term_id, $taxonomy ) {
/* Set up some default arrays. */
$parents = array();
/* While there is a parent ID, add the parent term link to the $parents array. */
while ( $term_id ) {
/* Get the parent term. */
$term = get_term( $term_id, $taxonomy );
/* Add the formatted term link to the array of parent terms. */
$parents[] = '<a href="' . get_term_link( $term, $taxonomy ) . '" title="' . esc_attr( $term->name ) . '">' . $term->name . '</a>';
/* Set the parent term's parent as the parent ID. */
$term_id = $term->parent;
}
/* If we have parent terms, reverse the array to put them in the proper order for the trail. */
if ( !empty( $parents ) )
$this->items = array_merge( $this->items, $parents );
}
/**
* Turns %tag% from permalink structures into usable links for the breadcrumb trail. This feels kind of
* hackish for now because we're checking for specific %tag% examples and only doing it for the 'post'
* post type. In the future, maybe it'll handle a wider variety of possibilities, especially for custom post
* types.
*
* @since 0.6.0
* @access public
* @param int $post_id ID of the post whose parents we want.
* @param string $path Path of a potential parent page.
* @param array $args Mixed arguments for the menu.
* @return array
*/