chamilo / chamilo-lms

        $group_id = $groupInfo['id'];

        $table_group_user = Database::get_course_table(TABLE_GROUP_USER);

        if (!empty($user_ids)) {

            foreach ($user_ids as $user_id) {

                if (self::can_user_subscribe($user_id, $groupInfo)) {

                    $user_id = intval($user_id);

                    $sql = "INSERT INTO ".$table_group_user." (c_id, user_id, group_id)

                            VALUES ('$course_id', '".$user_id."', '".$group_id."')";

                    Database::query($sql);

                }

            }

        }

        return true;

    }

                break;

            case TOOL_THREAD:  //forum post

                $tbl_topics = Database::get_course_table(TABLE_FORUM_THREAD);

                if (!empty($id)) {

                    $sql = "SELECT * FROM $tbl_topics WHERE c_id = $course_id AND thread_id=$id";

                    $result = Database::query($sql);

                    $myrow = Database::fetch_array($result);

                    $link .= $main_dir_path.'forum/viewthread.php?thread='.$id.'&forum='.$myrow['forum_id'].'&lp=true&'.$extraParams;

                }

                break;

            case TOOL_POST:

                $tbl_post = Database::get_course_table(TABLE_FORUM_POST);