Elgg\Database\UsersTable::markBanned PHP Method

    public function markBanned($guid, $banned)
    {
        $query = "\n\t\t\tUPDATE {$this->table}\n\t\t\tSET banned = :banned\n\t\t\tWHERE guid = :guid\n\t\t";
        $params = [':banned' => $banned ? 'yes' : 'no', ':guid' => (int) $guid];
        return $this->db->updateData($query, true, $params);
    }