Wordress - Functions :Creating breadcrumbs listing pages post parents and children

Functions.php

//Bread crumbs created 	
function wordpress_breadcrumbs() {
  $delimiter = '|';
  $currentBefore = '<span class="current">';
  $currentAfter = '</span>';
  if ( !is_home() && !is_front_page() || is_paged() ) {
    echo '<div id="crumbs">';
    global $post;
	if ( is_page() && !$post->post_parent ) {
		echo $currentBefore;
		the_title();
		echo $currentAfter; }
	elseif ( is_page() && $post->post_parent ) {
      $parent_id  = $post->post_parent;
      $breadcrumbs = array();
      while ($parent_id) {
        $page = get_page($parent_id);
        $breadcrumbs[] = '<a href="' . get_permalink($page->ID) . '">' . get_the_title($page->ID) . '</a>';
        $parent_id  = $page->post_parent;
      }
      $breadcrumbs = array_reverse($breadcrumbs);
      foreach ($breadcrumbs as $crumb) echo $crumb . ' ' . $delimiter . ' ';
      echo $currentBefore;
      the_title();
      echo $currentAfter;
    }
    echo '</div>';
  }
}

template.php

<?php wordpress_breadcrumbs(); ?>