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home/aerosoft/public_html/exam/_[ Writable ]

File:/home/aerosoft/public_html/exam/generate_certificate - Copy.php

<?php
session_start();
include 'config.php';

// Check authentication
if (!isset($_SESSION['student_id']) && !isset($_SESSION['admin_id'])) {
    header("Location: login.php");
    exit();
}

$exam_id = $_GET['exam_id'] ?? null;

if (!$exam_id) {
    // Show detailed error message
    echo '<div class="container mt-5">
        <div class="alert alert-danger">
            <h4>No Exam ID Provided</h4>
            <p>The certificate generation requires a valid exam ID. This could be because:</p>
            <ul>
                <li>The link was clicked incorrectly</li>
                <li>The exam doesn\'t exist</li>
                <li>You don\'t have permission to access this certificate</li>
            </ul>
            <p><strong>Exam ID received:</strong> ' . (isset($_GET['exam_id']) ? htmlspecialchars($_GET['exam_id']) : 'None') . '</p>
            <a href="student_dashboard.php" class="btn btn-primary">Return to Dashboard</a>
        </div>
    </div>';
    exit();
}

// Validate exam_id is numeric
if (!is_numeric($exam_id)) {
    die("Invalid exam ID format. Exam ID must be a number.");
}

try {
    // Determine user type and build query accordingly
    if (isset($_SESSION['admin_id'])) {
        // Admin can view any certificate
        $stmt = $pdo->prepare("SELECT e.*, c.name as category_name, s.name as student_name, s.email,
                               cert.certificate_code, cert.issued_date, cert.expiry_date
                               FROM exams e 
                               JOIN categories c ON e.category_id = c.id 
                               JOIN students s ON e.student_id = s.id 
                               LEFT JOIN certificates cert ON cert.exam_id = e.id 
                               WHERE e.id = ?");
        $stmt->execute([$exam_id]);
    } else {
        // Students can only view their own certificates
        $student_id = $_SESSION['student_id'];
        $stmt = $pdo->prepare("SELECT e.*, c.name as category_name, s.name as student_name, s.email,
                               cert.certificate_code, cert.issued_date, cert.expiry_date
                               FROM exams e 
                               JOIN categories c ON e.category_id = c.id 
                               JOIN students s ON e.student_id = s.id 
                               LEFT JOIN certificates cert ON cert.exam_id = e.id 
                               WHERE e.id = ? AND e.student_id = ?");
        $stmt->execute([$exam_id, $student_id]);
    }
    
    $data = $stmt->fetch();

    if (!$data) {
        echo '<div class="container mt-5">
            <div class="alert alert-warning">
                <h4>Exam Not Found</h4>
                <p>The requested exam could not be found or you don\'t have permission to access it.</p>
                <p><strong>Exam ID:</strong> ' . htmlspecialchars($exam_id) . '</p>
                <a href="student_dashboard.php" class="btn btn-primary">Return to Dashboard</a>
            </div>
        </div>';
        exit();
    }

    // Check if exam is passed
    if ($data['status'] !== 'passed') {
        echo '<div class="container mt-5">
            <div class="alert alert-info">
                <h4>Certificate Not Available</h4>
                <p>Certificates are only available for passed exams. Your exam status: <strong>' . htmlspecialchars($data['status']) . '</strong></p>
                <p>Score: ' . $data['percentage'] . '% (Required: ' . $data['passing_marks'] . '%)</p>
                <a href="exam_landing.php?category_id=' . $data['category_id'] . '" class="btn btn-warning">Retake Exam</a>
                <a href="student_dashboard.php" class="btn btn-primary">Return to Dashboard</a>
            </div>
        </div>';
        exit();
    }

    // Create certificate if it doesn't exist
    if (empty($data['certificate_code'])) {
        $certificate_code = 'CERT-' . strtoupper(uniqid());
        $expiry_date = date('Y-m-d', strtotime('+1 year'));
        $issued_date = date('Y-m-d H:i:s');
        
        $stmt = $pdo->prepare("INSERT INTO certificates (student_id, exam_id, certificate_code, issued_date, expiry_date) 
                              VALUES (?, ?, ?, ?, ?)");
        $stmt->execute([$data['student_id'], $exam_id, $certificate_code, $issued_date, $expiry_date]);
        
        // Refresh data
        if (isset($_SESSION['admin_id'])) {
            $stmt = $pdo->prepare("SELECT e.*, c.name as category_name, s.name as student_name, 
                                   cert.certificate_code, cert.issued_date, cert.expiry_date
                                   FROM exams e 
                                   JOIN categories c ON e.category_id = c.id 
                                   JOIN students s ON e.student_id = s.id 
                                   JOIN certificates cert ON cert.exam_id = e.id 
                                   WHERE e.id = ?");
            $stmt->execute([$exam_id]);
        } else {
            $student_id = $_SESSION['student_id'];
            $stmt = $pdo->prepare("SELECT e.*, c.name as category_name, s.name as student_name, 
                                   cert.certificate_code, cert.issued_date, cert.expiry_date
                                   FROM exams e 
                                   JOIN categories c ON e.category_id = c.id 
                                   JOIN students s ON e.student_id = s.id 
                                   JOIN certificates cert ON cert.exam_id = e.id 
                                   WHERE e.id = ? AND e.student_id = ?");
            $stmt->execute([$exam_id, $student_id]);
        }
        $data = $stmt->fetch();
    }

    // Check if TCPDF is available
    if (!file_exists('tcpdf/tcpdf.php')) {
        // Fallback: Show HTML certificate
        showHtmlCertificate($data);
        exit();
    }

    // Generate PDF certificate
    require_once('tcpdf/tcpdf.php');
    generatePdfCertificate($data);

} catch (Exception $e) {
    echo '<div class="container mt-5">
        <div class="alert alert-danger">
            <h4>Error Generating Certificate</h4>
            <p><strong>Error:</strong> ' . htmlspecialchars($e->getMessage()) . '</p>
            <p>Please contact administrator if this problem persists.</p>
            <a href="student_dashboard.php" class="btn btn-primary">Return to Dashboard</a>
        </div>
    </div>';
}

function generatePdfCertificate($data) {
    // Create PDF
    $pdf = new TCPDF('L', 'mm', 'A4', true, 'UTF-8', false);
    
    // Set document information
    $pdf->SetCreator('CertiPro System');
    $pdf->SetAuthor('CertiPro');
    $pdf->SetTitle('Certificate - ' . $data['category_name']);
    $pdf->SetSubject('Professional Certification');
    
    // Remove header/footer
    $pdf->setPrintHeader(false);
    $pdf->setPrintFooter(false);
    
    // Set margins
    $pdf->SetMargins(15, 15, 15);
    $pdf->AddPage();
    
    // Add content
    $html = '
    <style>
        .certificate { 
            text-align: center; 
            color: #333;
            font-family: helvetica;
        }
        .title { 
            font-size: 28px; 
            font-weight: bold; 
            color: #2c3e50; 
            margin-bottom: 30px;
            text-decoration: underline;
        }
        .subtitle { 
            font-size: 18px; 
            color: #7f8c8d; 
            margin-bottom: 40px;
        }
        .student-name { 
            font-size: 32px; 
            font-weight: bold; 
            color: #e74c3c; 
            margin: 30px 0;
            padding: 10px;
            border: 2px solid #3498db;
            border-radius: 10px;
            background: #f8f9fa;
        }
        .course-name { 
            font-size: 24px; 
            color: #3498db; 
            margin: 20px 0;
            font-weight: bold;
        }
        .details { 
            font-size: 16px; 
            color: #555; 
            margin: 20px 0;
            line-height: 1.6;
        }
        .signature { 
            margin-top: 60px;
        }
        .signature-table {
            width: 100%;
            margin-top: 40px;
        }
        .footer { 
            margin-top: 40px; 
            font-size: 12px; 
            color: #95a5a6;
        }
    </style>
    
    <div class="certificate">
        <div class="title">CERTIFICATE OF COMPLETION</div>
        <div class="subtitle">This is to certify that</div>
        
        <div class="student-name">' . htmlspecialchars($data['student_name']) . '</div>
        
        <div class="details">
            has successfully completed the <strong class="course-name">' . htmlspecialchars($data['category_name']) . '</strong> course<br>
            with a final score of <strong>' . $data['percentage'] . '%</strong><br>
            on ' . date('F j, Y', strtotime($data['issued_date'])) . '
        </div>
        
        <table class="signature-table">
            <tr>
                <td style="width: 50%; text-align: center;">
                    <div style="border-top: 2px solid #333; width: 200px; margin: 0 auto; padding-top: 10px;">
                        <strong>Arjun Singh</strong><br>
                        Senior Instructor
                    </div>
                </td>
                <td style="width: 50%; text-align: center;">
                    <div style="border-top: 2px solid #333; width: 200px; margin: 0 auto; padding-top: 10px;">
                        <strong>Sunil Kumar</strong><br>
                        Program Director
                    </div>
                </td>
            </tr>
        </table>
        
        <div class="footer">
            Certificate ID: ' . $data['certificate_code'] . ' | 
            Issued: ' . date('M j, Y', strtotime($data['issued_date'])) . ' | 
            Valid Until: ' . date('M j, Y', strtotime($data['expiry_date'])) . '
        </div>
    </div>';
    
    $pdf->writeHTML($html, true, false, true, false, '');
    $pdf->Output('certificate_' . $data['certificate_code'] . '.pdf', 'D');
}

function showHtmlCertificate($data) {
    ?>
    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Certificate - <?php echo htmlspecialchars($data['category_name']); ?></title>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
        <style>
            body { 
                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                min-height: 100vh;
                display: flex;
                align-items: center;
                justify-content: center;
                padding: 20px;
            }
            .certificate-container {
                background: white;
                border: 10px solid #2c3e50;
                border-radius: 15px;
                padding: 40px;
                max-width: 800px;
                box-shadow: 0 10px 30px rgba(0,0,0,0.3);
                position: relative;
            }
            .certificate-container::before {
                content: '';
                position: absolute;
                top: 20px;
                left: 20px;
                right: 20px;
                bottom: 20px;
                border: 2px solid #3498db;
                border-radius: 10px;
                pointer-events: none;
            }
            .certificate-title {
                font-size: 2.5rem;
                font-weight: bold;
                color: #2c3e50;
                text-align: center;
                margin-bottom: 30px;
                text-decoration: underline;
            }
            .certificate-subtitle {
                font-size: 1.2rem;
                color: #7f8c8d;
                text-align: center;
                margin-bottom: 40px;
            }
            .student-name {
                font-size: 2.2rem;
                font-weight: bold;
                color: #e74c3c;
                text-align: center;
                margin: 30px 0;
                padding: 20px;
                border: 3px solid #3498db;
                border-radius: 10px;
                background: #f8f9fa;
            }
            .course-name {
                font-size: 1.8rem;
                color: #3498db;
                text-align: center;
                margin: 20px 0;
                font-weight: bold;
            }
            .certificate-details {
                font-size: 1.1rem;
                color: #555;
                text-align: center;
                margin: 30px 0;
                line-height: 1.6;
            }
            .signature-area {
                margin-top: 60px;
            }
            .signature-line {
                border-top: 2px solid #333;
                width: 250px;
                margin: 0 auto;
                padding-top: 10px;
            }
            .certificate-footer {
                margin-top: 40px;
                font-size: 0.9rem;
                color: #95a5a6;
                text-align: center;
            }
            @media print {
                body {
                    background: white !important;
                    padding: 0;
                }
                .no-print {
                    display: none;
                }
                .certificate-container {
                    border: none;
                    box-shadow: none;
                    padding: 20px;
                }
            }
        </style>
    </head>
    <body>
        <div class="certificate-container">
            <div class="certificate-title">CERTIFICATE OF COMPLETION</div>
            <div class="certificate-subtitle">This is to certify that</div>
            
            <div class="student-name"><?php echo htmlspecialchars($data['student_name']); ?></div>
            
            <div class="certificate-details">
                has successfully completed the <span class="course-name"><?php echo htmlspecialchars($data['category_name']); ?></span><br>
                with a final score of <strong><?php echo $data['percentage']; ?>%</strong><br>
                on <?php echo date('F j, Y', strtotime($data['issued_date'])); ?>
            </div>
            
            <div class="signature-area">
                <div class="row">
                    <div class="col-md-6 text-center">
                        <div class="signature-line">
                            <strong>Arjun Singh</strong><br>
                            Senior Instructor
                        </div>
                    </div>
                    <div class="col-md-6 text-center">
                        <div class="signature-line">
                            <strong>Sunil Kumar</strong><br>
                            Program Director
                        </div>
                    </div>
                </div>
            </div>
            
            <div class="certificate-footer">
                Certificate ID: <?php echo $data['certificate_code']; ?><br>
                Issued: <?php echo date('M j, Y', strtotime($data['issued_date'])); ?> | 
                Valid Until: <?php echo date('M j, Y', strtotime($data['expiry_date'])); ?>
            </div>
        </div>
        
        <div class="no-print text-center mt-4">
            <button onclick="window.print()" class="btn btn-primary me-2">
                <i class="fas fa-print"></i> Print Certificate
            </button>
            <a href="student_dashboard.php" class="btn btn-secondary">
                <i class="fas fa-arrow-left"></i> Back to Dashboard
            </a>
            <div class="mt-3">
                <small class="text-white">
                    <i class="fas fa-info-circle"></i> 
                    For PDF version, install TCPDF library in the tcpdf folder
                </small>
            </div>
        </div>

        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/js/all.min.js"></script>
    </body>
    </html>
    <?php
}
?>

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