$queried_object = get_queried_object();
print_r( $queried_object );
/*
вернет:
stdClass Object
(
[term_id] => 452
[name] => Метка
[slug] => metka
[term_group] => 0
[term_taxonomy_id] => 452
[taxonomy] => post_tag
[description] =>
[parent] => 0
[count] => 14
[filter] => raw
)
*/
$term_list = wp_get_post_terms( 2647, 'post_tag', array('fields' => 'all') );
/*
$term_list будет содержать подобные данные:
Array(
[0] => stdClass Object(
[term_id] => 44
[name] => Новичкам
[slug] => for_newbie
[term_group] => 0
[term_taxonomy_id] => 44
[taxonomy] => post_tag
[description] =>
[parent] => 0
[count] => 7
)