// attempt to extract the other id parameter
$url_vars = explode('&', $_SERVER["QUERY_STRING"]);
$url_id = 0;
foreach ($url_vars as $test_id) {
if (is_numeric($test_id)) {
$url_id = $test_id;
break;
}
}
}
$valid = false;
$quiz = new Quiz($url_id);
// check if quiz exists
if ($quiz->exists()) {
// check if quiz has questions!
if ($quiz->numQuestions() > 0) {
$valid = true;
} else {
$valid = false;
}
}
if (!$valid) {
if ($quiz->exists()) {
header("Location: previewQuiz.php?id=" . $quiz->quiz_id);
} else {
header("Location: previewQuiz.php");
}
} else {
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">