if (!$challenge_entity->can_play()) {
register_error(elgg_echo('izap-contest:challenge:not_accepted_yet'));
forward($challenge_entity->getURL());
}
// check time... if user can answer
if (!$challenge_entity->timeLeft()) {
register_error(elgg_echo('izap-contest:challenge:error:timeout'));
$result = $challenge_entity->save_results(FALSE);
forward(IzapBase::setHref(array('context' => GLOBAL_IZAP_CONTEST_CHALLENGE_PAGEHANDLER, 'action' => 'result', 'page_owner' => false, 'vars' => array($challenge_entity->guid, $result->guid, elgg_get_friendly_title($challenge_entity->title)))));
}
// set total to zero, if it is not set yet, to calculate the negative marking.
if (!isset($_SESSION['challenge'][$challenge_entity->guid]['totals'])) {
$_SESSION['challenge'][$challenge_entity->guid]['totals'] = 0;
}
// get all access from the system to user
Izapbase::getAllAccess();
// all answers
$answers_array = unserialize($quiz_entity->options);
$answer_var = elgg_get_logged_in_user_entity()->username . '_answer';
$correct_var = elgg_get_logged_in_user_entity()->username . '_is_correct';
if ($quiz_form['answer'] == 'Answer' && $quiz_entity->correct_option == $quiz_form['correct_option']) {
$quiz_entity->{$correct_var} = 'yes';
$_SESSION['challenge'][$challenge_entity->guid]['answers'][$quiz_entity->guid]['is_correct'] = TRUE;
$_SESSION['challenge'][$challenge_entity->guid]['totals']++;
$_SESSION['challenge'][$challenge_entity->guid]['total_correct_answers']++;
} else {
$quiz_entity->{$correct_var} = 'no';
$_SESSION['challenge'][$challenge_entity->guid]['answers'][$quiz_entity->guid]['is_correct'] = FALSE;
if ($quiz_form['answer'] == 'Answer') {
if ($challenge_entity->negative_marking) {
$_SESSION['challenge'][$challenge_entity->guid]['totals']--;
