public function save_approve_result()
{
$id = $_GET['id'];
$approve = $_GET['approve'];
ExamsData::approve_result($id, $approve);
if ($approve == 1) {
$message = '<div id="success">Exam Approved!</div>';
} else {
$message = '<div id="error">Exam Disapproved!</div>';
}
$this->set('message', $message);
$this->set('unapproved', ExamsData::get_exams_unapproved());
$this->show('exams/exam_admin');
}