settings.php

<?php
// This file is part of the Moodle plugin block_evasys_sync
//
// 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/>.

/**
 * @package block_evasys_sync
 * @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.
    $ADMIN->add('blocksettings', new admin_externalpage(
        'block_evasys_sync',
        get_string('evasys_sync', 'block_evasys_sync'),
        new moodle_url('/blocks/evasys_sync/adminsettings.php')
    ));
}
$settings = null;