chamilo / chamilo-lms

        $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, $group_id)) {

                    $user_id = intval($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;

        $table_group_tutor = Database :: get_course_table(TABLE_GROUP_TUTOR);

        $group_id = intval($group_id);

        foreach ($user_ids as $user_id) {

            $user_id = intval($user_id);

            if (self::can_user_subscribe($user_id, $group_id, false)) {

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

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

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

            }

        }

        return $result;

    }