function definition_after_data() {
global $DB, $CFG, $USER;
$request = new requests();
$mform = $this->_form;
$program = $request->student_enrolled_program($USER->id);
if (count($program) > 2) {
$pid = $mform->getElementValue('programid');
if (isset($pid) && !empty($pid) && $pid[0] > 0) {
$sem = $request->student_enrolled_sem($pid[0]);
$one = $mform->createElement('select', 'semesterid', get_string('semester', 'local_request'), $sem);
$mform->insertElementBefore($one, 'beforesem');
$mform->addRule('semesterid', get_string('required'), 'required', null, 'client');
}
}
}