slug; $args = array( 'post_type' => 'conseils', 'tax_query' => array( array( 'taxonomy' => 'thematiques', 'field' => 'slug', 'terms' => $mainThematique->slug, ) ) ); $relatedConseils = new WP_Query($args); $relatedConseilsUrl = get_permalink($relatedConseils->posts[0]->ID) ?? null; ?>