<?php
$pageTitle = "Exam Results";
include_once('includes/header.php');
// Get student ID
$student_id = $_SESSION['user_id'];
// Check if specific exam ID is provided
$exam_id = isset($_GET['id']) ? intval($_GET['id']) : 0;
// If exam ID is provided, show detailed result
if ($exam_id > 0) {
// Get exam details and student's result
$query = "
SELECT se.*, es.title as exam_title, es.description, es.passing_percentage,
es.exam_date, es.duration_minutes,
c.title as course_title, c.image as course_image,
CONCAT(i.first_name, ' ', i.last_name) as instructor_name
FROM student_exams se
JOIN exam_schedules es ON se.exam_id = es.id
JOIN courses c ON es.course_id = c.id
LEFT JOIN users i ON c.instructor_id = i.id
LEFT JOIN enrollments e ON e.course_id = c.id AND e.user_id = se.user_id
WHERE se.user_id = ? AND se.exam_id = ?
ORDER BY se.attempt_date DESC
LIMIT 1
";
$stmt = $conn->prepare($query);
$stmt->bind_param("ii", $student_id, $exam_id);
$stmt->execute();
$result = $stmt->get_result();
if ($result->num_rows > 0) {
$exam_result = $result->fetch_assoc();
// Get exam questions and student's answers
$questions_query = "
SELECT eq.*, eq.question_text, eq.mark, eq.question_type,
sea.selected_option, sea.answer_text,
CASE
WHEN eq.question_type = 'mcq' AND sea.selected_option = eq.correct_option THEN 'correct'
WHEN eq.question_type = 'descriptive' AND sea.marks_awarded IS NOT NULL THEN
CASE WHEN sea.marks_awarded = eq.mark THEN 'correct'
WHEN sea.marks_awarded = 0 THEN 'incorrect'
ELSE 'partial' END
WHEN sea.selected_option IS NOT NULL OR sea.answer_text IS NOT NULL THEN 'incorrect'
ELSE 'unanswered'
END as status,
sea.marks_awarded
FROM exam_questions eq
LEFT JOIN student_exam_answers sea ON sea.question_id = eq.id AND sea.student_exam_id = ?
WHERE eq.exam_id = ?
ORDER BY eq.question_order ASC
";
$q_stmt = $conn->prepare($questions_query);
$q_stmt->bind_param("ii", $exam_result['id'], $exam_id);
$q_stmt->execute();
$questions = $q_stmt->get_result();
// Calculate statistics
$total_questions = $questions->num_rows;
$answered = 0;
$correct = 0;
$incorrect = 0;
$partial = 0;
$temp_questions = [];
while ($q = $questions->fetch_assoc()) {
$temp_questions[] = $q;
if ($q['status'] != 'unanswered') {
$answered++;
if ($q['status'] == 'correct') {
$correct++;
} else if ($q['status'] == 'incorrect') {
$incorrect++;
} else if ($q['status'] == 'partial') {
$partial++;
}
}
}
$questions_data = $temp_questions;
// Get certificate info if exam is passed
$certificate_query = "
SELECT ec.*
FROM exam_certificates ec
JOIN student_exams se ON ec.student_exam_id = se.id
WHERE se.user_id = ? AND se.exam_id = ? AND se.status = 'passed'
";
$cert_stmt = $conn->prepare($certificate_query);
$cert_stmt->bind_param("ii", $student_id, $exam_id);
$cert_stmt->execute();
$cert_result = $cert_stmt->get_result();
$certificate = $cert_result->num_rows > 0 ? $cert_result->fetch_assoc() : null;
if ($exam_result['status'] == 'failed') {
// Check if 7 days have passed since the attempt
$attempt_date = new DateTime($exam_result['attempt_date']);
$current_date = new DateTime();
$days_passed = $current_date->diff($attempt_date)->days;
$can_reattempt = ($days_passed >= 7);
// Check if student has already paid for a re-attempt
$payment_query = "
SELECT * FROM payments
WHERE user_id = ? AND exam_id = ? AND payment_type = 'reattempt_fee'
AND status = 'completed' AND created_at > ?
";
$payment_stmt = $conn->prepare($payment_query);
$one_week_ago = date('Y-m-d H:i:s', strtotime('-7 days'));
$payment_stmt->bind_param("iis", $student_id, $exam_id, $one_week_ago);
$payment_stmt->execute();
$payment_result = $payment_stmt->get_result();
$has_paid = $payment_result->num_rows > 0;
}
} else {
$_SESSION['error_message'] = "Exam result not found or you haven't taken this exam yet.";
header("Location: scheduled-exams.php");
exit();
}
} else {
// Get all exam results for the student
$query = "
SELECT se.*, es.title as exam_title, es.passing_percentage,
es.exam_date, c.title as course_title,
c.image as course_image, c.id as course_id
FROM student_exams se
JOIN exam_schedules es ON se.exam_id = es.id
JOIN courses c ON es.course_id = c.id
WHERE se.user_id = ?
ORDER BY se.attempt_date DESC
";
$stmt = $conn->prepare($query);
$stmt->bind_param("i", $student_id);
$stmt->execute();
$results = $stmt->get_result();
}
?>
<div class="container py-4">
<?php if (isset($_SESSION['success_message'])): ?>
<div class="alert alert-success alert-dismissible fade show" role="alert">
<i class="fas fa-check-circle me-2"></i> <?php echo $_SESSION['success_message']; ?>
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
<?php unset($_SESSION['success_message']); endif; ?>
<?php if (isset($_SESSION['error_message'])): ?>
<div class="alert alert-danger alert-dismissible fade show" role="alert">
<i class="fas fa-exclamation-circle me-2"></i> <?php echo $_SESSION['error_message']; ?>
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
<?php unset($_SESSION['error_message']); endif; ?>
<?php if ($exam_id > 0 && isset($exam_result)): ?>
<!-- Detailed Exam Result View -->
<div class="d-flex justify-content-between align-items-center mb-4">
<h2>Exam Result: <?php echo htmlspecialchars($exam_result['exam_title']); ?></h2>
<a href="exam-results.php" class="btn btn-outline-primary">
<i class="fas fa-arrow-left me-2"></i>Back to All Results
</a>
</div>
<!-- Result Summary Card -->
<div class="card mb-4">
<div class="card-header bg-primary text-white">
<h5 class="mb-0"><i class="fas fa-chart-pie me-2"></i>Result Summary</h5>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-6">
<div class="d-flex align-items-center mb-3">
<?php if (!empty($exam_result['course_image'])): ?>
<img src="../<?php echo htmlspecialchars($exam_result['course_image']); ?>" alt="Course Image" class="me-3 rounded" style="width: 80px; height: 80px; object-fit: cover;">
<?php else: ?>
<div class="me-3 rounded bg-light d-flex align-items-center justify-content-center" style="width: 80px; height: 80px;">
<i class="fas fa-book fa-2x text-primary"></i>
</div>
<?php endif; ?>
<div>
<h5 class="mb-1"><?php echo htmlspecialchars($exam_result['course_title']); ?></h5>
<p class="mb-1 text-muted">Instructor: <?php echo htmlspecialchars($exam_result['instructor_name']); ?></p>
<p class="mb-0 text-muted">
<i class="far fa-calendar-alt me-1"></i>
<?php echo date('d M Y', strtotime($exam_result['exam_date'])); ?>
</p>
</div>
</div>
<div class="mb-3">
<p class="mb-1"><strong>Attempt Date:</strong> <?php echo date('d M Y h:i A', strtotime($exam_result['attempt_date'])); ?></p>
<p class="mb-1"><strong>Time Taken:</strong> <?php echo $exam_result['time_taken']; ?> minutes</p>
<p class="mb-1"><strong>Passing Percentage:</strong> <?php echo $exam_result['passing_percentage']; ?>%</p>
</div>
<div class="alert <?php echo $exam_result['status'] == 'passed' ? 'alert-success' : 'alert-danger'; ?>">
<div class="d-flex align-items-center">
<div class="me-3">
<?php if ($exam_result['status'] == 'passed'): ?>
<i class="fas fa-check-circle fa-3x"></i>
<?php else: ?>
<i class="fas fa-times-circle fa-3x"></i>
<?php endif; ?>
</div>
<div>
<h5 class="alert-heading mb-1">
<?php echo $exam_result['status'] == 'passed' ? 'Congratulations!' : 'Better Luck Next Time!'; ?>
</h5>
<p class="mb-0">
<?php if ($exam_result['status'] == 'passed'): ?>
You have successfully passed this exam with a score of <?php echo $exam_result['percentage']; ?>%.
<?php else: ?>
You did not pass this exam. Your score was <?php echo $exam_result['percentage']; ?>%, but you needed <?php echo $exam_result['passing_percentage']; ?>% to pass.
<?php endif; ?>
</p>
</div>
</div>
</div>
<?php if ($certificate): ?>
<div class="mt-3">
<a href="../verify-certificate.php?cert=<?php echo urlencode($certificate['certificate_number']); ?>" class="btn btn-success" target="_blank">
<i class="fas fa-certificate me-2"></i> View Certificate
</a>
</div>
<?php endif; ?>
</div>
<div class="col-md-6">
<div class="card h-100">
<div class="card-body">
<h5 class="card-title">Score Breakdown</h5>
<div class="d-flex justify-content-center align-items-center mb-4" style="height: 200px;">
<div class="position-relative" style="width: 180px; height: 180px;">
<div class="position-absolute top-50 start-50 translate-middle text-center">
<h3 class="mb-0"><?php echo $exam_result['percentage']; ?>%</h3>
<p class="mb-0 small text-muted">Total Score</p>
</div>
<canvas id="scoreChart" width="180" height="180"></canvas>
</div>
</div>
<div class="row text-center">
<div class="col-4">
<div class="p-3 rounded bg-success bg-opacity-10 mb-2">
<h3 class="mb-0 text-success"><?php echo $correct; ?></h3>
</div>
<p class="small mb-0">Correct</p>
</div>
<div class="col-4">
<div class="p-3 rounded bg-danger bg-opacity-10 mb-2">
<h3 class="mb-0 text-danger"><?php echo $incorrect; ?></h3>
</div>
<p class="small mb-0">Incorrect</p>
</div>
<div class="col-4">
<div class="p-3 rounded bg-warning bg-opacity-10 mb-2">
<h3 class="mb-0 text-warning"><?php echo $total_questions - $answered; ?></h3>
</div>
<p class="small mb-0">Unanswered</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- Questions and Answers -->
<div class="card mb-4">
<div class="card-header bg-primary text-white">
<h5 class="mb-0"><i class="fas fa-list-ol me-2"></i>Questions and Answers</h5>
</div>
<div class="card-body">
<div class="accordion" id="accordionQuestions">
<?php foreach ($questions_data as $index => $question): ?>
<div class="accordion-item mb-3">
<h2 class="accordion-header" id="heading<?php echo $index; ?>">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapse<?php echo $index; ?>" aria-expanded="false" aria-controls="collapse<?php echo $index; ?>">
<div class="d-flex align-items-center w-100">
<div class="me-3">
<?php if ($question['status'] == 'correct'): ?>
<span class="badge bg-success rounded-circle"><i class="fas fa-check"></i></span>
<?php elseif ($question['status'] == 'incorrect'): ?>
<span class="badge bg-danger rounded-circle"><i class="fas fa-times"></i></span>
<?php elseif ($question['status'] == 'partial'): ?>
<span class="badge bg-warning rounded-circle"><i class="fas fa-adjust"></i></span>
<?php else: ?>
<span class="badge bg-secondary rounded-circle"><i class="fas fa-minus"></i></span>
<?php endif; ?>
</div>
<div class="flex-grow-1">
<div>Question <?php echo $index + 1; ?>: <?php echo htmlspecialchars($question['question_text']); ?></div>
<div class="small text-muted">
<?php echo ucfirst($question['question_type']); ?> |
Marks: <?php echo isset($question['marks_awarded']) ? $question['marks_awarded'] : 0; ?>/<?php echo $question['mark']; ?>
</div>
</div>
</div>
</button>
</h2>
<div id="collapse<?php echo $index; ?>" class="accordion-collapse collapse" aria-labelledby="heading<?php echo $index; ?>" data-bs-parent="#accordionQuestions">
<div class="accordion-body">
<?php if ($question['question_type'] == 'mcq'): ?>
<div class="mb-3">
<p><strong>Options:</strong></p>
<div class="ms-3">
<?php for ($i = 1; $i <= 4; $i++): ?>
<?php
$option_class = '';
if ($i == $question['correct_option']) {
$option_class = 'text-success fw-bold';
}
if ($i == $question['selected_option'] && $i != $question['correct_option']) {
$option_class = 'text-danger fw-bold';
}
?>
<div class="mb-2 <?php echo $option_class; ?>">
<div class="d-flex">
<div class="me-2"><?php echo chr(64 + $i); ?>.</div>
<div><?php echo htmlspecialchars($question['option' . $i]); ?></div>
</div>
</div>
<?php endfor; ?>
</div>
</div>
<div class="row">
<div class="col-md-6">
<p><strong>Your Answer:</strong>
<?php
if ($question['selected_option']) {
echo chr(64 + $question['selected_option']) . '. ' . htmlspecialchars($question['option' . $question['selected_option']]);
} else {
echo 'Not answered';
}
?>
</p>
</div>
<div class="col-md-6">
<p><strong>Correct Answer:</strong>
<?php echo chr(64 + $question['correct_option']) . '. ' . htmlspecialchars($question['option' . $question['correct_option']]); ?>
</p>
</div>
</div>
<?php else: ?>
<div class="mb-3">
<p><strong>Your Answer:</strong></p>
<div class="border p-3 rounded bg-light">
<?php echo nl2br(htmlspecialchars($question['answer_text'] ?? 'Not answered')); ?>
</div>
</div>
<?php if (isset($question['marks_awarded'])): ?>
<div class="mb-3">
<p><strong>Marks Awarded:</strong> <?php echo $question['marks_awarded']; ?> out of <?php echo $question['mark']; ?></p>
</div>
<?php endif; ?>
<?php if (!empty($question['correct_answer'])): ?>
<div class="mb-3">
<p><strong>Model Answer:</strong></p>
<div class="border p-3 rounded bg-light">
<?php echo nl2br(htmlspecialchars($question['correct_answer'])); ?>
</div>
</div>
<?php endif; ?>
<?php endif; ?>
</div>
</div>
</div>
<?php endforeach; ?>
</div>
</div>
</div>
<!-- Feedback and Improvement -->
<div class="card">
<div class="card-header bg-primary text-white">
<h5 class="mb-0"><i class="fas fa-comment me-2"></i>Feedback and Improvement</h5>
</div>
<div class="card-body">
<?php if ($exam_result['status'] == 'passed'): ?>
<div class="alert alert-success">
<h5><i class="fas fa-thumbs-up me-2"></i>Great job!</h5>
<p>You've successfully passed this exam. This demonstrates a good understanding of the course material.</p>
</div>
<div class="mt-3">
<h5>Next Steps:</h5>
<ul>
<li>Download your certificate and add it to your profile</li>
<li>Explore advanced courses in this topic</li>
<li>Share your achievement with peers and on your professional profiles</li>
</ul>
</div>
<?php else: ?>
<div class="alert alert-warning">
<h5><i class="fas fa-lightbulb me-2"></i>Areas for Improvement</h5>
<p>Don't worry about not passing this time. Here are some suggestions to help you improve:</p>
</div>
<div class="mt-3">
<h5>Recommendations:</h5>
<ul>
<li>Review the topics where you struggled the most</li>
<li>Go through course materials again, focusing on areas with incorrect answers</li>
<li>Practice with additional exercises and sample questions</li>
<li>Consider reaching out to your instructor for additional guidance</li>
</ul>
</div>
<div class="mt-4">
<a href="scheduled-exams.php" class="btn btn-primary">
<i class="fas fa-redo me-2"></i>Check if you can retake the exam
</a>
</div>
<?php endif; ?>
</div>
</div>
<!-- Chart.js for Score Chart -->
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
document.addEventListener('DOMContentLoaded', function() {
// Score Pie Chart
var ctx = document.getElementById('scoreChart').getContext('2d');
var scoreChart = new Chart(ctx, {
type: 'doughnut',
data: {
labels: ['Correct', 'Incorrect', 'Unanswered'],
datasets: [{
data: [<?php echo $correct; ?>, <?php echo $incorrect; ?>, <?php echo $total_questions - $answered; ?>],
backgroundColor: [
'rgba(40, 167, 69, 0.8)',
'rgba(220, 53, 69, 0.8)',
'rgba(108, 117, 125, 0.8)'
],
borderColor: [
'rgba(40, 167, 69, 1)',
'rgba(220, 53, 69, 1)',
'rgba(108, 117, 125, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
cutout: '75%',
plugins: {
legend: {
display: false
}
}
}
});
});
</script>
<?php if ($exam_id > 0 && isset($exam_result) && $exam_result['status'] == 'failed'): ?>
<div class="card mt-4">
<div class="card-header bg-warning">
<h5 class="mb-0 text-dark"><i class="fas fa-redo me-2"></i>Re-attempt Exam</h5>
</div>
<div class="card-body">
<?php if (!$can_reattempt): ?>
<div class="alert alert-info">
<i class="fas fa-info-circle me-2"></i> You can re-attempt this exam after 7 days from your last attempt.
<?php
$days_remaining = 7 - $days_passed;
echo "Please wait " . ($days_remaining == 1 ? "1 more day" : "$days_remaining more days") . " to re-attempt.";
?>
</div>
<?php elseif ($has_paid): ?>
<div class="alert alert-success">
<i class="fas fa-check-circle me-2"></i> You have already paid the re-attempt fee. You can now re-attempt the exam.
</div>
<a href="take_exam.php?id=<?php echo $exam_id; ?>&reattempt=1" class="btn btn-primary">
<i class="fas fa-edit me-2"></i> Re-attempt Exam Now
</a>
<?php else: ?>
<div class="alert alert-light">
<p><i class="fas fa-info-circle me-2"></i> You can now re-attempt this exam with a payment of ₹50.</p>
<p>Re-attempting the exam gives you another chance to pass and earn your certificate.</p>
</div>
<form action="exam_payment.php" method="post">
<input type="hidden" name="exam_id" value="<?php echo $exam_id; ?>">
<input type="hidden" name="payment_type" value="reattempt_fee">
<input type="hidden" name="amount" value="50">
<button type="submit" class="btn btn-warning">
<i class="fas fa-credit-card me-2"></i> Pay ₹50 to Re-attempt
</button>
</form>
<?php endif; ?>
</div>
</div>
<?php endif; ?>
<?php else: ?>
<!-- All Exam Results List View -->
<div class="d-flex justify-content-between align-items-center mb-4">
<h2><?php echo $pageTitle; ?></h2>
<a href="scheduled-exams.php" class="btn btn-outline-primary">
<i class="fas fa-calendar-alt me-2"></i>View Upcoming Exams
</a>
</div>
<?php if ($results->num_rows > 0): ?>
<div class="row">
<?php while ($result = $results->fetch_assoc()): ?>
<div class="col-md-6 col-lg-4 mb-4">
<div class="card h-100">
<div class="card-header d-flex justify-content-between align-items-center">
<h5 class="mb-0"><?php echo htmlspecialchars($result['exam_title']); ?></h5>
<span class="badge <?php echo $result['status'] == 'passed' ? 'bg-success' : 'bg-danger'; ?>">
<?php echo ucfirst($result['status']); ?>
</span>
</div>
<div class="card-body">
<div class="d-flex align-items-center mb-3">
<?php if (!empty($result['course_image'])): ?>
<img src="../<?php echo htmlspecialchars($result['course_image']); ?>" alt="Course Image" class="me-3 rounded" style="width: 60px; height: 60px; object-fit: cover;">
<?php else: ?>
<div class="me-3 rounded bg-light d-flex align-items-center justify-content-center" style="width: 60px; height: 60px;">
<i class="fas fa-book fa-2x text-primary"></i>
</div>
<?php endif; ?>
<div>
<h6 class="mb-1"><?php echo htmlspecialchars($result['course_title']); ?></h6>
<p class="small text-muted mb-0">
<i class="far fa-calendar-alt me-1"></i>
<?php echo date('d M Y', strtotime($result['attempt_date'])); ?>
</p>
</div>
</div>
<div class="mb-3">
<div class="progress" style="height: 10px;">
<div class="progress-bar <?php echo $result['status'] == 'passed' ? 'bg-success' : 'bg-danger'; ?>"
role="progressbar"
style="width: <?php echo $result['percentage']; ?>%;"
aria-valuenow="<?php echo $result['percentage']; ?>"
aria-valuemin="0"
aria-valuemax="100">
</div>
</div>
<div class="d-flex justify-content-between mt-1">
<small>Score: <?php echo $result['percentage']; ?>%</small>
<small>Passing: <?php echo $result['passing_percentage']; ?>%</small>
</div>
</div>
<div class="mb-3">
<p class="small mb-1"><strong>Time Taken:</strong> <?php echo $result['time_taken']; ?> minutes</p>
<p class="small mb-1"><strong>Total Questions:</strong> <?php echo $result['total_questions']; ?></p>
<p class="small mb-0"><strong>Correct Answers:</strong> <?php echo $result['correct_answers']; ?></p>
</div>
<div class="text-center mt-3">
<a href="exam-results.php?id=<?php echo $result['exam_id']; ?>" class="btn btn-primary">
<i class="fas fa-eye me-1"></i> View Details
</a>
</div>
</div>
<div class="card-footer bg-white border-top-0 text-center">
<?php if ($result['status'] == 'passed'): ?>
<a href="certificates.php" class="btn btn-outline-success btn-sm">
<i class="fas fa-certificate me-1"></i> View Certificate
</a>
<?php else: ?>
<a href="scheduled-exams.php" class="btn btn-outline-secondary btn-sm">
<i class="fas fa-sync me-1"></i> Check Retake Options
</a>
<?php endif; ?>
</div>
</div>
</div>
<?php endwhile; ?>
</div>
<?php else: ?>
<div class="alert alert-info">
<div class="d-flex">
<div class="me-3">
<i class="fas fa-info-circle fa-2x"></i>
</div>
<div>
<h5>No Exam Results Yet</h5>
<p class="mb-0">You haven't taken any exams yet. Check the upcoming exams schedule to see available exams.</p>
<a href="scheduled-exams.php" class="btn btn-primary mt-3">View Scheduled Exams</a>
</div>
</div>
</div>
<?php endif; ?>
<?php endif; ?>
</div>
<?php include_once('includes/footer.php'); ?>
