settings.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Global block settings definition.
 *
 * @package   block_course_recent
 * @copyright 2014 The Regents of the University of California
 * @copyright 2010 Remote Learner - http://www.remote-learner.net/
 * @author    Carson Tam <carson.tam@ucsf.edu>, Akin Delamarre <adelamarre@remote-learner.net>
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->dirroot.'/blocks/course_recent/lib.php');

$choices = [];

for ($i = LOWER_LIMIT; $i <= UPPER_LIMIT; $i++) {
    $choices[$i] = $i;
}

$settings->add(
    new admin_setting_configselect(
        'block_course_recent_default',
        get_string('default_max', 'block_course_recent'),
        get_string('default_max_desc', 'block_course_recent'),
        DEFAULT_MAX,
        $choices
    )
);

$settings->add(
    new admin_setting_configcheckbox(
        'block_course_recent_musthaverole',
        get_string('musthaverole', 'block_course_recent'),
        get_string('musthaverole_desc', 'block_course_recent'),
        1
    )
);