$changes = $this->db->prepare("DELETE FROM arsse_folders where owner = ? and id = ?", "str", "int")->run($user, $id)->changes();
$changes = $this->db->prepare("WITH RECURSIVE folders(folder) as (SELECT ? union select id from arsse_folders join folders on parent = folder) DELETE FROM arsse_folders where owner = ? and id in (select folder from folders)", "int", "str")->run($id, $user)->changes();