public static function update_entry($entryid, $data) {
        global $DB;

        $params = array('entryid' => $entryid, 'data' => $data);
        $params = self::validate_parameters(self::update_entry_parameters(), $params);
        $warnings = array();
        $fieldnotifications = array();
        $updated = false;

        $record = $DB->get_record('data_records', array('id' => $params['entryid']), '*', MUST_EXIST);
        list($database, $course, $cm, $context) = self::validate_database($record->dataid);
        // Check database is open in time.
        data_require_time_available($database, null, $context);

        if (!data_user_can_manage_entry($record, $database, $context)) {
            throw new moodle_exception('noaccess', 'data');
        }

        // Prepare the data as is expected by the API.
        $datarecord = new stdClass;
        foreach ($params['data'] as $data) {
            $subfield = ($data['subfield'] !== '') ? '_' . $data['subfield'] : '';
            // We ask for JSON encoded values because of multiple choice forms or checkboxes that use array parameters.
            $datarecord->{'field_' . $data['fieldid'] . $subfield} = json_decode($data['value']);
        }
        // Validate to ensure that enough data was submitted.
        $fields = $DB->get_records('data_fields', array('dataid' => $database->id));
        $processeddata = data_process_submission($database, $fields, $datarecord);

        // Format notifications.
        if (!empty($processeddata->fieldnotifications)) {
            foreach ($processeddata->fieldnotifications as $field => $notififications) {
                foreach ($notififications as $notif) {
                    $fieldnotifications[] = [
                        'fieldname' => $field,
                        'notification' => $notif,
                    ];
                }
            }
        }

        if ($processeddata->validated) {
            // Now update the fields contents.
            data_update_record_fields_contents($database, $record, $context, $datarecord, $processeddata);
            $updated = true;
        }

        $result = array(
            'updated' => $updated,
            'generalnotifications' => $processeddata->generalnotifications,
            'fieldnotifications' => $fieldnotifications,
            'warnings' => $warnings,
        );
        return $result;
    }