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quiz.php
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quiz.php
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<?php
include_once 'header.php';
if (@$_GET['eid']) {
$eid = @$_GET['eid'];
$s = mysqli_query($link, "SELECT * FROM quiz WHERE eid='$eid' ");
$sQuiz = mysqli_fetch_array($s);
$quizName = $sQuiz['title'];
$quizTime = $sQuiz['time'] * 60000;
$quizCountdownTime = $sQuiz['time'] * 60;
$updatedViews = $sQuiz['views'] + 1;
mysqli_query($link, "UPDATE quiz SET views='$updatedViews' WHERE eid='$eid' ");
echo'
<script>
// Countdown timer for quiz submission
var quizTimeLeft = ' . $quizCountdownTime . ';
var downloadTimer = setInterval(function(){
quizTimeLeft--;
document.getElementById("quiztimer").textContent = quizTimeLeft;
if(quizTimeLeft <= 0)
clearInterval(downloadTimer);
},1000);
</script>
';
echo '
<div class="container-fluid">
<div class="jumbotron text-center">
<br><br>
<h1 class="text-white">' . $quizName . '</h1>
</div>
</div>
<br>
<div class="container">
';
}
if (@$_GET['page'] == 'quiz' && !(@$_GET['step'])) {
echo '
<p><button type="button" class="btn btn-info"><b>Time Limit: <span class="badge badge-light" id="quiztimer">' . $quizTime . '</span> seconds left</b></button></p>
<form id="quiz_form" action="quiz.php?eid=' . $eid . '" method="POST">
<script>
setTimeout(function() {
$(\'#quiz_form\').submit();
} ,' . $quizTime . ');
</script>
';
$q = mysqli_query($link, "SELECT * FROM questions WHERE eid='$eid' ORDER BY id ASC");
$radioCounter = 1;
while ($row = mysqli_fetch_array($q)) {
$qns = stripslashes($row['qns']);
$qid = $row['qid'];
$sn = $row['sn'];
echo '
<div class="card text-white bg-info border-dark">
<div class="card-header">Question ' . $sn . ' - ' . $qns . '
</div>
<div class="card-body">
<div class="bloc">
<select name="ans' . $radioCounter . '" size="4">
<option id="none" value="none" selected hidden>
';
$k = mysqli_query($link, "SELECT * FROM options WHERE qid='$qid' ");
while ($row = mysqli_fetch_array($k)) {
$option = stripslashes($row['option']);
$optionid = $row['optionid'];
echo '
<option id="' . $optionid . '" value="' . $optionid . '">
<label for="' . $optionid . '" style="width:50%">' . $option . '</label>
';
}
echo '
</select>
</div>
</div>
</div>
<br>
';
$radioCounter++;
}
echo '
<div class="text-center">
<input type="submit" class="btn btn-info btn-outline-dark" value="Submit Quiz">
</div>
</form>
<br><br><br>
</div>
';
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$eid = @$_GET['eid'];
/* store answers in an array for marking */
$answers = array();
$score = 0;
$index = 0;
/* select correct answers from db */
$questions = mysqli_query($link, "SELECT * FROM questions WHERE eid='$eid' ORDER BY id ASC");
/* populate the answers array */
while ( $rs = mysqli_fetch_array($questions) ) {
$questionID = $rs['qid'];
$correctAnswer = mysqli_query($link, "SELECT * FROM answer WHERE qid='$questionID' ");
$rs2 = mysqli_fetch_array($correctAnswer);
$actualAnswer = $rs2['ansid'];
$answers[] = $actualAnswer;
}
/* mark the answers */
foreach ( $_POST as $question => $answer ) {
if ( $answer == $answers[$index] ) {
$score++;
}
$index++;
}
$scorePercent = ($score / $index) * 100;
/* show score */
echo '
<div class="align-center">
<div class="progress">
<div class="progress-bar progress-bar-striped bg-info" style="width: ' . $scorePercent . '%"></div>
</div>
<br>
Your score is <b>'. $score . '</b> out of a total of <b>' . $index . '</b>!
</div>
';
}
?>
</body>
</html>