Basic breadcrumbs

Breadcrumbs.php

<?php
function the_breadcrumb() {
  global $post;
  $blog = '<li><a href="'.esc_url( home_url() ).'/blog/" ?>Blog</a></li>';

  echo '<div class="breadcrumbs-wrap">';
    echo '<ul class="breadcrumbs">';
      if (is_category() ) {
        echo '<li>';
        the_category('');
        echo '</li>';
        if (is_single()) {
          echo '<li>';
          the_title();
          echo '</li>';
        }
      // check to see if it's a single blog post or blog
      } else if ( is_singular('post') OR is_home() ) {
        echo $blog;
        if (is_single()) {
          echo '<li>';
          the_title();
          echo '</li>';
        }
      // check if it's a custom post type (example)
      } else if ( is_singular('news-releases') OR is_post_type_archive('news-releases') ) {
        echo '<li><a href="'.esc_url( home_url() ).'/about-us/">About Us</a></li>';
        echo '<li><a href="'.esc_url( home_url() ).'/about-us/news-releases/">News Releases</a></li>';
      // check if it's a page
      } elseif (is_page()) {
        if($post->post_parent){
          $anc    = get_post_ancestors( $post->ID );
          $title  = get_the_title();
          $output = '';
          foreach ( $anc as $ancestor ) {
            $output = '<li><a href="'.get_permalink($ancestor).'" title="'.get_the_title($ancestor).'">'.get_the_title($ancestor).'</a></li>' . $output;
          }
          echo $output;
          echo '<li>'.$title.'</li>';
        } else {
          echo '<li>'.get_the_title().'</li>';
        }
      }
      elseif (is_tag()) {single_tag_title();}
      elseif (is_day()) {echo"$blog <li>Archive for "; the_time('F jS, Y'); echo'</li>';}
      elseif (is_month()) {echo"$blog <li>Archive for "; the_time('F, Y'); echo'</li>';}
      elseif (is_year()) {echo"$blog <li>Archive for "; the_time('Y'); echo'</li>';}
      elseif (is_author()) {echo"$blog <li>Author Archive"; echo'</li>';}
      elseif (isset($_GET['paged']) && !empty($_GET['paged'])) {echo "$blog <li>Blog Archives"; echo'</li>';}
      elseif (is_search()) {echo"<li>Search Results"; echo'</li>';}
    echo '</ul>';
  echo '</div>';
}