Hi Guys hope your all well,
I have found some code to create a quiz and this I have done, it was working a few weeks ago... but for some reason its now decied to stop working!
When I run the page on my localhost I'm getting the following eorror
Fatal error: Call to a member function fetch_assoc() on a non-object in C:\xampp\htdocs\quiz.php on line 8
This is the code so far
<?php
//Connect with mysql
$db = new mysqli("127.0.0.1", "root", "", "quiz");
//Perform the query to choose random questions
$query = $db->query("SELECT * FROM `table` ORDER BY RAND() LIMIT 20");
while ($row = $query->fetch_assoc()):
$question = $row['question'];
echo $question . "<br />";
endwhile;
//close result
$query->close();
//Close connection
$db->close();
session_start();
if (isset($_GET['question'])) {
$question = preg_replace('/[^0-9]/', "", $_GET['question']);
$next = $question + 1;
$prev = $question - 1;
} // <--- I added this brace. You need to double-check it logically belongs here
if (!isset($_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);
}
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...";
}
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>
</body>
</html>
Any help would be great
