I would like to know this as well.
What I came up with is:
PHP Code:
require_once(DIR . '/vb/search/core.php');
$searchcontroller = vB_Search_Core::get_instance()->get_search_controller();
$similarthreads = $searchcontroller->get_similar_threads('test');
Basically, it should find similar threads matching the query 'test' but is an empty Array instead.
I altered the database and changed thread.similar to 1,2,3,4 but that doesn't seem to work either.
Who can point me to the right direction?