Hey guys I really need some help if you can ASAP, my website is now done and this is the last thing that needs to be sorted....
I seriously need some help. I have added in 80 questions into the database. The website is a learning aid for users like myself who suffer with Dyscalculia. I have chose to focus on Fractions (adding, subtracting, multiplication and division)
The quiz shows all of the 80 and the results show on screen once the user has completed the quiz!
I need some advice, I want the quiz to generate just 20 ramdom questions from the database.. how can this be done? I was talking to someone from my old uni and he said I would have to have a counter (20) and an array to help with this has anyone got any ideas?
This is the quiz code so far....
<?php
session_start();
if(isset($_GET['question'])){
$question = preg_replace('/[^0-9]/', "", $_GET['question']);
$next = $question + 1;
$prev = $question - 1;
if(!isset($_SESSION['qid_array']) && $question != 1){
$msg = "Sorry! No cheating.";
header("location: start.php?msg=$msg");
exit();
}
if(isset($_SESSION['qid_array']) && in_array($question, $_SESSION['qid_array'])){
$msg = "Sorry, Cheating is not allowed. You will now have to start over. Haha.";
unset($_SESSION['answer_array']);
unset($_SESSION['qid_array']);
session_destroy();
header("location: start.php?msg=$msg");
exit();
}
if(isset($_SESSION['lastQuestion']) && $_SESSION['lastQuestion'] != $prev){
$msg = "Sorry, Cheating is not allowed. You will now have to start over. Haha.";
unset($_SESSION['answer_array']);
unset($_SESSION['qid_array']);
session_destroy();
header("location: start.php?msg=$msg");
exit();
}
}
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Quiz Page</title>
<script type="text/javascript">
function countDown(secs,elem) {
var element = document.getElementById(elem);
element.innerHTML = "You have "+secs+" seconds remaining.";
if(secs < 1) {
var xhr = new XMLHttpRequest();
var url = "userAnswers.php";
var vars = "radio=0"+"&qid="+<?php echo $question; ?>;
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {
if(xhr.readyState == 4 && xhr.status == 200) {
alert("You did not answer the question in the allotted time. It will be marked as incorrect.");
clearTimeout(timer);
}
}
xhr.send(vars);
document.getElementById('counter_status').innerHTML = "";
document.getElementById('btnSpan').innerHTML = '<h2>Times Up!</h2>';
document.getElementById('btnSpan').innerHTML += '<a href="quiz.php?question=<?php echo $next; ?>">Click here now</a>';
}
secs--;
var timer = setTimeout('countDown('+secs+',"'+elem+'")',1000);
}
</script>
<script>
function getQuestion(){
var hr = new XMLHttpRequest();
hr.onreadystatechange = function(){
if (hr.readyState==4 && hr.status==200){
var response = hr.responseText.split("|");
if(response[0] == "finished"){
document.getElementById('status').innerHTML = response[1];
}
var nums = hr.responseText.split(",");
document.getElementById('question').innerHTML = nums[0];
document.getElementById('answers').innerHTML = nums[1];
document.getElementById('answers').innerHTML += nums[2];
}
}
hr.open("GET", "questions.php?question=" + <?php echo $question; ?>, true);
hr.send();
}
function x() {
var rads = document.getElementsByName("rads");
for ( var i = 0; i < rads.length; i++ ) {
if ( rads[i].checked ){
var val = rads[i].value;
return val;
}
}
}
function post_answer(){
var p = new XMLHttpRequest();
var id = document.getElementById('qid').value;
var url = "userAnswers.php";
var vars = "qid="+id+"&radio="+x();
p.open("POST", url, true);
p.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
p.onreadystatechange = function() {
if(p.readyState == 4 && p.status == 200) {
document.getElementById("status").innerHTML = '';
alert("Thanks, Your answer was submitted"+ p.responseText);
var url = 'quiz.php?question=<?php echo $next; ?>';
window.location = url;
}
}
p.send(vars);
document.getElementById("status").innerHTML = "processing...";
}
</script>
<script>
window.oncontextmenu = function(){
return false;
}
</script>
</head>
<body onLoad="getQuestion()">
<div id="status">
<div id="counter_status"></div>
<div id="question"></div>
<div id="answers"></div>
</div>
<script type="text/javascript">countDown(45,"counter_status");</script>
</body>
</html>
Any help would be appreciated
Thanks
Rich
