Wordpress Write Breadcrumb

wp-write-breadcrumb.php

/**
  * http://www.bloggingtips.com/2009/02/22/create-a-breadcrumb-trail/
  **/
  function write_breadcrumb() {
			$pid = $post->ID;
			$trail = '<a href="'.get_site_url().'/">'. __('Home', 'textdomain') .'</a>';
			if (is_front_page()) {
				// do nothing
			}
			elseif (is_page()) {
				$bcarray = array();
				$pdata = get_post($pid);
				$bcarray[] = ' &gt; '.$pdata->post_title."\n";
				while ($pdata->post_parent) {
					$pdata = get_post($pdata->post_parent);
					$bcarray[] = ' &gt; <a href="'.get_permalink($pdata->ID).'">'.$pdata->post_title.'</a>';
				}
				$bcarray = array_reverse($bcarray);
				foreach ($bcarray AS $listitem) {
					$trail .= $listitem;
				}
			}
			elseif (is_single()) {
				$pdata = get_the_category($pid);
				$adata = get_post($pid);
				if(!empty($pdata)){
					$data = get_category_parents($pdata[0]->cat_ID, TRUE, ' &gt; ');
					$trail .= " &gt; ".substr($data,0,-5);
				}
				$trail.= ' &gt; '.$adata->post_title."\n";
			}
			elseif (is_category()) {
				$pdata = get_the_category($pid);
				$data = get_category_parents($pdata[0]->cat_ID, TRUE, ' &gt; ');
				if(!empty($pdata)){
					//return $data;
					$trail .= " &gt; ".substr($data,0,-5);
				}
			}
			$trail.="";
			return $trail;
		}