settings.php

<?php
// This file is part of Moodle - https://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/>.

/**
 * NOTICE OF COPYRIGHT
 *
 *                      Online Judge for Moodle
 *        https://github.com/hit-moodle/moodle-local_onlinejudge
 *
 * Copyright (C) 2009 onwards
 *                      Sun Zhigang  http://sunner.cn
 *                      Andrew Naguib <andrew at fci helwan edu eg>
 * This program 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.
 *
 * This program 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:
 *
 *          http://www.gnu.org/copyleft/gpl.html
 */

/**
 * Administration forms of the online judge
 *
 * @package   local_onlinejudge
 * @copyright 2011 Sun Zhigang (http://sunner.cn)
 * @author    Sun Zhigang
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') || die;

if ($hassiteconfig) { // needs this condition or there is error on login page
    require_once($CFG->dirroot . '/local/onlinejudge/judgelib.php');

    $temp = new admin_settingpage('onlinejudge', get_string('pluginname', 'local_onlinejudge'));
    $temp->add(new admin_setting_configtext('local_onlinejudge/judgecheckinterval', get_string('judgecheckinterval', 'local_onlinejudge'), get_string('judgecheckinterval_help', 'local_onlinejudge'), 5, PARAM_INT));
    $temp->add(new admin_setting_configtext('local_onlinejudge/maxmemlimit', get_string('maxmemlimit', 'local_onlinejudge'), get_string('maxmemlimit_help', 'local_onlinejudge'), 64, PARAM_INT));
    $temp->add(new admin_setting_configtext('local_onlinejudge/maxcpulimit', get_string('maxcpulimit', 'local_onlinejudge'), get_string('maxcpulimit_help', 'local_onlinejudge'), 10, PARAM_INT));
    $temp->add(new admin_setting_configtext('local_onlinejudge/sedelay', get_string('sedelay', 'local_onlinejudge'), get_string('sedelay_help', 'local_onlinejudge'), 10, PARAM_INT));

    $choices = onlinejudge_get_languages();
    $temp->add(new admin_setting_configselect('local_onlinejudge/defaultlanguage', get_string('defaultlanguage', 'local_onlinejudge'), get_string('defaultlanguage_help', 'local_onlinejudge'), '', $choices));

    $temp->add(new admin_setting_users_with_capability('local_onlinejudge/judgedcrashnotify', get_string('judgedcrashnotify', 'local_onlinejudge'), get_string('judgedcrashnotify_help', 'local_onlinejudge'), array(), 'moodle/site:config'));

    $ADMIN->add('localplugins', $temp);
}