upgrade.php

<?php

/**
 * Upgrade code for install
 *
 * @package   assignsubmission_dta
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

/**
 * Stub for upgrade code
 * @param int $oldversion
 * @return bool
 */
function xmldb_assignsubmission_dta_upgrade($oldversion) {
    global $CFG;

    // Moodle v2.8.0 release upgrade line.
    // Put any upgrade step following this.

    // Moodle v2.9.0 release upgrade line.
    // Put any upgrade step following this.

    // Moodle v3.0.0 release upgrade line.
    // Put any upgrade step following this.

    // Moodle v3.1.0 release upgrade line.
    // Put any upgrade step following this.

    return true;
}