terms breadcrumbs

wp-terms-breadcurmbs.php

<?php 
/**
 * Get the Term List Breadcrumbs
 * Same as get_the_term_list() but outputs a terms parents as part of the link.
 * Useful when you have many subcategories all with the same name.
 */
function get_the_term_list_breadcrumbs( $id = 0, $taxonomy, $before = '', $sep = '', $after = '', $breadcrumb_sep = ' &rarr; ' ) {
	$terms = get_the_terms( $id, $taxonomy );
 
	if ( is_wp_error( $terms ) )
		return $terms;
 
	if ( empty( $terms ) )
		return false;
 
	foreach ( $terms as $term ) {
		$link = get_term_link( $term, $taxonomy );
		if ( is_wp_error( $link ) )
			return $link;
		
		// Find parents
		$names = array();
		$ancestors = get_ancestors( $term->term_id, $taxonomy );
		if ( count( $ancestors ) > 0 ) {
			foreach ( $ancestors as $anc ) {
				$t = get_term( $anc, $taxonomy );
				$names[] = $t->name;
			}
		}
		$names[] = $term->name;
		$link_text = implode( $breadcrumb_sep, $names );
		
		$term_links[] = '<a href="' . $link . '" rel="tag">' . $link_text . '</a>';
	}
 
	$term_links = apply_filters( "term_links-$taxonomy", $term_links );
 
	return $before . join( $sep, $term_links ) . $after;
}