edit_form.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/>.

/**
 * Edit form
 *
 * @package    block
 * @subpackage section
 * @copyright  2013 onwards Nathan Robbins (https://github.com/nrobbins)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

class block_section_edit_form extends block_edit_form {
    protected function specific_definition($mform) {
        $context = $this->page->context;

        // Section header title according to language file.
        $mform->addElement('header', 'configheader', get_string('blocksettings', 'block_section'));

        // Give the block a title.
        $mform->addElement('text', 'config_title', get_string('blocktitle', 'block_section'));
        $mform->setDefault('config_title', get_string('blocktitle', 'block_section'));
        $mform->setType('config_title', PARAM_MULTILANG);
        $mform->addHelpButton('config_title', 'blocktitle', 'block_section');

        if (has_capability('block/section:addinstance', $context)) {
            $mform->addElement('text', 'config_course', get_string('blockcourse', 'block_section'));
            $mform->setDefault('config_course', $this->page->course->id);
            $mform->setType('config_course', PARAM_INTEGER);
            $mform->addHelpButton('config_course', 'blockcourse', 'block_section');

            // Select the section to display.
            $mform->addElement('text', 'config_section', get_string('blocksection', 'block_section'));
            $mform->setDefault('config_section', 0);
            $mform->setType('config_section', PARAM_INTEGER);
            $mform->addHelpButton('config_section', 'blocksection', 'block_section');
        }
    }
}