categories

Function wp_list_categories has an argument echo with you have set to 1 (true). When if it is set to true, instead of returning the value, the function will output the content. Because nothing was returned the var_dump displays null. Change the echo to false in your arguments array to have the value returned.

change image on single product page with js

I figured it out. To get the selected category, I don’t need all the codes above. I just need the below. $category = wp_get_object_terms( $post->ID, ‘acadp_categories’ ); $selected_category = $category[0]->name;