//***Fil d'Arianne
function myget_category_parents($id, $link = false,$separator = '/',$nicename = false,$visited = array()) {
    $chain = '';$parent = &get_category($id);
        if (is_wp_error($parent))return $parent;
        if ($nicename)$name = $parent->name;
        else $name = $parent->cat_name;
        if ($parent->parent && ($parent->parent != $parent->term_id ) && !in_array($parent->parent, $visited)) {
                $visited[] = $parent->parent;$chain .= myget_category_parents( $parent->parent, $link, $separator, $nicename, $visited );}
        if ($link) $chain .= '<span typeof="v:Breadcrumb"><a href="' . get_category_link( $parent->term_id ) . '" title="Voir tous les articles de '.$parent->cat_name.'" rel="v:url" property="v:title">'.$name.'</a></span>' . $separator;
        else $chain .= $name.$separator;
        return $chain;}
function mybread() {
    global $wp_query;$ped=get_query_var('paged');$rendu = '<div xmlns:v="http://rdf.data-vocabulary.org/#">';
    if ( !is_home() ) {$rendu .= '<span id="breadex">Vous &ecirc;tes ici :</span> <span typeof="v:Breadcrumb"><a title="'. get_bloginfo('name') .'" id="breadh" href="'.home_url().'" rel="v:url" property="v:title">'. get_bloginfo('name') .'</a></span>';}
    elseif ( is_home() ) {$rendu .= '<span id="breadex">Vous &ecirc;tes ici :</span> <span typeof="v:Breadcrumb">Accueil de '. get_bloginfo('name') .'</span>';}
    if ( is_category() ) {
        $cat_obj = $wp_query->get_queried_object();$thisCat = $cat_obj->term_id;$thisCat = get_category($thisCat);$parentCat = get_category($thisCat->parent);
        if ($thisCat->parent != 0) $rendu .= " &raquo; ".myget_category_parents($parentCat, true, " &raquo; ", true);
        if ($thisCat->parent == 0) {$rendu .= " &raquo; ";}
        if ( $ped <= 1 ) {$rendu .= single_cat_title("", false);}
        elseif ( $ped > 1 ) {
            $rendu .= '<span typeof="v:Breadcrumb"><a href="' . get_category_link( $thisCat ) . '" title="Voir tous les articles de '.single_cat_title("", false).'" rel="v:url" property="v:title">'.single_cat_title("", false).'</a></span>';}}
    elseif ( is_author()){
        global $author;$user_info = get_userdata($author);$rendu .= " &raquo; Articles de l'auteur ".$user_info->display_name."</span>";}
    elseif ( is_tag()){
        $tag=single_tag_title("",FALSE);$rendu .= " &raquo; Articles sur le th&egrave;me <span>".$tag."</span>";}
        elseif ( is_date() ) {
                if ( is_day() ) {
                        global $wp_locale;
                        $rendu .= '<span typeof="v:Breadcrumb"><a href="'.get_month_link( get_query_var('year'), get_query_var('monthnum') ).'" rel="v:url" property="v:title">'.$wp_locale->get_month( get_query_var('monthnum') ).' '.get_query_var('year').'</a></span> ';
                        $rendu .= " &raquo; Archives pour ".get_the_date();}
        else if ( is_month() ) {
                        $rendu .= " &raquo; Archives pour ".single_month_title(' ',false);}
        else if ( is_year() ) {
                        $rendu .= " &raquo; Archives pour ".get_query_var('year');}}
    elseif ( is_archive() && !is_category()){
                $posttype = get_post_type();
        $tata = get_post_type_object( $posttype );
        $var = '';
        $the_tax = get_taxonomy( get_query_var( 'taxonomy' ) );
        $titrearchive = $tata->labels->menu_name;
        if (!empty($the_tax)){$var = $the_tax->labels->name.' ';}
                if (empty($the_tax)){$var = $titrearchive;}
        $rendu .= ' &raquo; Archives sur "'.$var.'"';}
    elseif ( is_search()) {
        $rendu .= " &raquo; R&eacute;sultats de votre recherche <span>&raquo; ".get_search_query()."</span>";}
    elseif ( is_404()){
        $rendu .= " &raquo; 404 Page non trouv&eacute;e";}
    elseif ( is_single()){
        $category = get_the_category();
        $category_id = get_cat_ID( $category[0]->cat_name );
        if ($category_id != 0) {
            $rendu .= " &raquo; ".myget_category_parents($category_id,TRUE,' &raquo; ')."<span>".the_title('','',FALSE)."</span>";}
        elseif ($category_id == 0) {
                $post_type = get_post_type();
            $tata = get_post_type_object( $post_type );
                $titrearchive = $tata->labels->menu_name;
                $urlarchive = get_post_type_archive_link( $post_type );
            $rendu .= ' &raquo; <span typeof="v:Breadcrumb"><a class="breadl" href="'.$urlarchive.'" title="'.$titrearchive.'" rel="v:url" property="v:title">'.$titrearchive.'</a></span> &raquo; <span>'.the_title('','',FALSE).'</span>';}}
    elseif ( is_page()) {
        $post = $wp_query->get_queried_object();
        if ( $post->post_parent == 0 ){$rendu .= " &raquo; ".the_title('','',FALSE)."";}
        elseif ( $post->post_parent != 0 ) {
            $title = the_title('','',FALSE);$ancestors = array_reverse(get_post_ancestors($post->ID));array_push($ancestors, $post->ID);
            foreach ( $ancestors as $ancestor ){
                if( $ancestor != end($ancestors) ){$rendu .= '&raquo; <span typeof="v:Breadcrumb"><a href="'. get_permalink($ancestor) .'" rel="v:url" property="v:title">'. strip_tags( apply_filters( 'single_post_title', get_the_title( $ancestor ) ) ) .'</a></span>';}
else {$rendu .= ' &raquo; '.strip_tags(apply_filters('single_post_title',get_the_title($ancestor))).'';}}}}
    if ( $ped >= 1 ) {$rendu .= ' (Page '.$ped.')';}
    $rendu .= '</div>';
    echo $rendu;}

<?php if (function_exists('mybread')) mybread();?>