<?php
// Check if session already started
if (session_status() === PHP_SESSION_NONE) {
session_start();
}
require_once '../../includes/db_connect.php';
// Set content type to JSON
header('Content-Type: application/json');
// Check if student is logged in
if (!isset($_SESSION['user_id']) || $_SESSION['role'] !== 'student') {
echo json_encode([
'success' => false,
'message' => 'Authentication required'
]);
exit();
}
$userId = $_SESSION['user_id'];
$response = [
'success' => false,
'message' => 'Invalid request'
];
// Validate input
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['enrollment_id'])) {
$enrollment_id = intval($_POST['enrollment_id']);
// Check if enrollment belongs to this student and is completed
$check_query = "
SELECT e.id, e.course_id, c.title as course_title,
CONCAT(u.first_name, ' ', u.last_name) as student_name,
u.email as student_email,
CONCAT(i.first_name, ' ', i.last_name) as instructor_name
FROM enrollments e
INNER JOIN courses c ON e.course_id = c.id
INNER JOIN users u ON e.user_id = u.id
LEFT JOIN users i ON c.instructor_id = i.id
WHERE e.id = ? AND e.user_id = ? AND (e.status = 'completed' OR c.status = 'completed')
";
$stmt = $conn->prepare($check_query);
$stmt->bind_param("ii", $enrollment_id, $userId);
$stmt->execute();
$result = $stmt->get_result();
if ($result->num_rows === 1) {
$enrollment_data = $result->fetch_assoc();
// Get institute information
$school = [
'site_name' => 'Popular Computer Institute',
'site_address' => 'Bhimpura No. 1, Ballia, Uttar Pradesh 221716, India',
'site_phone' => '+91 9984878446',
'site_email' => '[email protected]',
'site_logo' => 'assets/img/logo.png',
'site_url' => 'https://pcib.in'
];
try {
$site_settings_query = "SELECT * FROM site_settings WHERE setting_key IN ('site_name', 'site_address', 'contact_phone', 'contact_email', 'site_logo', 'site_url')";
$site_settings_result = $conn->query($site_settings_query);
if ($site_settings_result && $site_settings_result->num_rows > 0) {
while($row = $site_settings_result->fetch_assoc()) {
// Map site_settings keys to our school array keys
$key_mapping = [
'site_name' => 'site_name',
'site_address' => 'site_address',
'site_phone' => 'site_phone',
'site_email' => 'site_email',
'site_logo' => 'site_logo',
'site_url' => 'site_url'
];
if (isset($key_mapping[$row['setting_key']])) {
$school[$key_mapping[$row['setting_key']]] = $row['setting_value'];
}
}
}
} catch (Exception $e) {
// Silently handle the error - default values already set
error_log("Settings table error: " . $e->getMessage());
}
// Generate certificate number
$certificate_number = 'PCIB-' . date('Y') . '-' . $enrollment_id . '-' . mt_rand(1000, 9999);
// Ensure the certificates directory exists
$cert_dir = '../../uploads/certificates/';
if (!file_exists($cert_dir)) {
mkdir($cert_dir, 0777, true);
}
// Create a unique certificate filename
$file_name = 'certificate_' . $userId . '_' . $enrollment_id . '_' . time() . '.pdf';
$certificate_path = '../../uploads/certificates/' . $file_name;
$full_path = '../../' . $certificate_path;
// Generate certificate HTML content
$certificate_html = '<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Course Completion Certificate</title>
<style>
body {
font-family: Arial, sans-serif;
color: #333;
margin: 0;
padding: 0;
}
.certificate-container {
max-width: 800px;
margin: 0 auto;
padding: 20px;
border: 15px solid #0d6efd;
position: relative;
background-color: #fff;
}
.logo {
text-align: center;
margin-bottom: 10px;
}
.logo img {
max-height: 80px;
}
.certificate-header {
text-align: center;
margin-bottom: 20px;
}
.certificate-title {
font-size: 28px;
font-weight: bold;
text-transform: uppercase;
margin-bottom: 10px;
color: #0d6efd;
}
.certificate-subtitle {
font-size: 18px;
margin-bottom: 10px;
}
.student-name {
font-size: 24px;
font-weight: bold;
text-align: center;
margin: 20px 0;
color: #333;
}
.certificate-content {
margin: 20px 0;
text-align: center;
font-size: 16px;
line-height: 1.5;
}
.certificate-footer {
display: flex;
justify-content: space-between;
margin-top: 40px;
}
.signature {
text-align: center;
width: 30%;
}
.signature-line {
width: 100%;
border-bottom: 1px solid #333;
margin-bottom: 5px;
}
.certificate-number {
text-align: center;
margin-top: 20px;
font-size: 14px;
color: #666;
}
.certificate-date {
text-align: right;
margin-top: 10px;
font-size: 14px;
}
.watermark {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) rotate(-45deg);
font-size: 60px;
color: rgba(13, 110, 253, 0.05);
z-index: 0;
white-space: nowrap;
}
</style>
</head>
<body>
<div class="certificate-container">
<div class="watermark">' . htmlspecialchars($school['site_name']) . '</div>
<div class="logo">
<img src="' . $school['site_logo'] . '" alt="' . htmlspecialchars($school['site_name']) . ' Logo">
</div>
<div class="certificate-header">
<div class="certificate-title">Certificate of Completion</div>
<div class="certificate-subtitle">This is to certify that</div>
</div>
<div class="student-name">' . htmlspecialchars($enrollment_data['student_name']) . '</div>
<div class="certificate-content">
has successfully completed the course<br>
<strong>"' . htmlspecialchars($enrollment_data['course_title']) . '"</strong><br>
at ' . htmlspecialchars($school['site_name']) . '.
</div>
<div class="certificate-footer">
<div class="signature">
<div class="signature-line"></div>
<div>Instructor</div>
<div>' . htmlspecialchars($enrollment_data['instructor_name'] ?? 'Course Instructor') . '</div>
</div>
<div class="signature">
<div class="signature-line"></div>
<div>Date</div>
<div>' . date('d F Y') . '</div>
</div>
<div class="signature">
<div class="signature-line"></div>
<div>Director</div>
<div>' . htmlspecialchars($school['site_name']) . '</div>
</div>
</div>
<div class="certificate-number">
Certificate Number: ' . $certificate_number . '<br>
Verify this certificate at: ' . htmlspecialchars($school['site_url'] ?? 'www.pcib.in') . '/verify
</div>
<div class="certificate-date">
Issued on: ' . date('d F Y') . '
</div>
</div>
</body>
</html>';
// Save the certificate file
if (file_put_contents($full_path, $certificate_html)) {
// Update the enrollment record
$update_query = "
UPDATE enrollments
SET certificate_number = ?, certificate_path = ?, certificate_issue_date = NOW()
WHERE id = ?
";
$stmt = $conn->prepare($update_query);
$stmt->bind_param("ssi", $certificate_number, $certificate_path, $enrollment_id);
if ($stmt->execute()) {
$response = [
'success' => true,
'message' => 'Certificate generated successfully!',
'certificate_path' => $certificate_path,
'certificate_number' => $certificate_number
];
} else {
$response = [
'success' => false,
'message' => 'Error updating enrollment record: ' . $stmt->error
];
}
} else {
$response = [
'success' => false,
'message' => 'Error saving certificate file'
];
}
} else {
$response = [
'success' => false,
'message' => 'Invalid enrollment or course not completed'
];
}
} else {
$response = [
'success' => false,
'message' => 'Missing enrollment ID'
];
}
// Return JSON response
echo json_encode($response);
?>
