// Mostrar artículos similares después del contenido del post
function mostrar_articulos_similares_por_etiqueta() {
    if (is_single()) {
        $tags = wp_get_post_tags(get_the_ID());

        if ($tags) {
            $tag_ids = array();
            foreach ($tags as $tag) {
                $tag_ids[] = $tag->term_id;
            }

            $args = array(
                'tag__in'         => $tag_ids,
                'post__not_in'    => array(get_the_ID()),
                'posts_per_page'  => 12,
                'orderby'         => 'date',
                'order'           => 'DESC'
            );

            $related_posts = new WP_Query($args);

            if ($related_posts->have_posts()) {
                echo '<div class="articulos-similares">';
                echo '<h3>Letras Similares</h3>';
                echo '<ul>';

                while ($related_posts->have_posts()) {
                    $related_posts->the_post();
                    echo '<li>';
                    echo '<a href="' . get_permalink() . '">' . get_the_title() . '</a>';
                    echo '</li>';
                }

                echo '</ul>';
                echo '</div>';

                wp_reset_postdata();
            }
        }
    }
}
add_action( 'bloghash_after_singular', 'mostrar_articulos_similares_por_etiqueta' );