Maxim Botsman, [14.03.21 16:47]
<?php
//Хлебные крошки

add_filter( 'wpseo_breadcrumb_links', 'wpseo_breadcrumb_add_woo_shop_link' );

function wpseo_breadcrumb_add_woo_shop_link( $links ) {
    global $post;
  global $wp;
  $current_url = home_url(add_query_arg(array(), $wp->request));

    if ( is_woocommerce() ) {
    $breadcrumb[] = array(
      'url' => get_permalink( woocommerce_get_page_id( 'shop' ) ),
      'text' => 'Услуги',
    );

    if ( strpos($current_url, "shop") !== false ) {
      array_pop( $links );
    }

    array_splice( $links, 1, -2, $breadcrumb );
    }

    return $links;
}

add_filter( 'wpseo_breadcrumb_links', 'yoast_seo_breadcrumb_append_link' );
function yoast_seo_breadcrumb_append_link( $links ) {
    global $post;
  global $wp;

    if ( is_single ( 123456 ) ) {
        $breadcrumb[] = array(
            'url' => site_url( '/blog/' ),
            'text' => 'Блог',
        );
        array_splice( $links, 1, -2, $breadcrumb );
    }

    return $links;
}

add_filter('wpseo_breadcrumb_single_link' ,'add_single_link', 10 ,2);

function add_single_link($link_output, $link ){
  global $wp;
  $output = array();
  $current_url = home_url(add_query_arg(array(), $wp->request));
//  a bits for debug
//   echo $link["url"] . " --- " . $current_url;
//   echo "<br />";

  if($link["url"] === $current_url . "/") {
    array_push($output, "<span class=\"current-page-breadcrumb\">".$link["text"]."</span>");
  } else {
    array_push($output, "<span><a href=". $link["url"] .">" . $link["text"] . "</a></span>");
  }

  $html_output = "";

  foreach ($output as $idx=>$crumb) {
    $html_output .= $crumb;
  }

  return $html_output;
}
?>