Use Tags Addon From Another Addon

hi everyone ,i want use tag addon inputs for my addon



i tried this but nothnig



$product_data[‘tags’] = array();

$product_data[‘tags’] = $meta_keywords;



print_r ($product_data[‘tags’]);



fn_update_tags ($product_data[‘tags’], $user_id = 0, $for_all_companies = true);



someone can help me ?