Custom function is name-spaced but still not working

Hey guys,

I am scratching my head over here… I have the following as a custom function but for some unknown reason it is not executing. I’ve linted the PHP to check for syntax errors. I can’t find any. Any help is greatly appreciated!

In lib/extras.php:

 * Custom Breadcrumbs
function custom_breadcrumb() {
    global $post;
    $title = get_the_title();
    $url = site_url('/newsevents/');
    echo '<ol class="breadcrumb">';
    if (!is_front_page()) {
        echo '<li><a href="';
        echo get_option('home');
        echo '">';
        echo 'Home';
        echo '</a></li>';
        if (is_home() || is_blog() ) {
            echo '<li>';
            echo '</li><a href="';
            echo $url;
            echo '">News</a><li>';
            if (is_single()) {
                echo '</li><li>';
                echo '</li>';
        } elseif (is_page()) {
                $anc = get_post_ancestors( $post->ID );
                $title = get_the_title();
                foreach ( $anc as $ancestor ) {
                    $output = '<li><a href="'.get_permalink($ancestor).'" title="'.get_the_title($ancestor).'">'.get_the_title($ancestor).'</a></li>';
                echo $output;
                echo $title;
            } else {
                echo '<li>'.get_the_title().'</li>';
    elseif (is_tag()) {single_tag_title();}
    elseif (is_day()) {echo"<li>Archive for "; the_time('F jS, Y'); echo'</li>';}
    elseif (is_month()) {echo"<li>Archive for "; the_time('F, Y'); echo'</li>';}
    elseif (is_year()) {echo"<li>Archive for "; the_time('Y'); echo'</li>';}
    elseif (is_author()) {echo"<li>Author Archive"; echo'</li>';}
    elseif (isset($_GET['paged']) && !empty($_GET['paged'])) {echo "<li>Blog Archives"; echo'</li>';}
    elseif (is_search()) {echo"<li>Search Results"; echo'</li>';}
    echo '</ol>';
add_filter('custom_breadcrumb', __NAMESPACE__ . '\\custom_breadcrumb');

In my template file:

          if ( function_exists('custom_breadcrumb') && !is_front_page() ) {
          } ?>

Adding the namespace to the function makes the function work BUT nothing below the breadcrumb loads.

          if ( function_exists('Roots\Sage\Extras\custom_breadcrumb') && !is_front_page() ) {
 } ?>

It would most likely help if you had WP_DEBUG turned on so you could view errors