php - How to Print some WordPress Cateogries? -

i've following code in attempt print second top category , category of search result:

$category = get_the_terms( $post_id , 'manualknowledgebasecat'); $number =  $category[0] -> term_id; echo get_category_parents( $numero, true, ' » ' ); 

the previous code print complete list of categories, want print second category , current category. example: if search result has categories: products >> nameoftheproduct >> manual >> configurations want print nameoftheproduct , configurations. how can ?

thank you replies in advance.

best regards.