false, 'message' => 'PDF library not installed. Run: composer require dompdf/dompdf']; } } } use Dompdf\Dompdf; use Dompdf\Options; class PDFGenerator { private $db; private $dompdf; private static $instance = null; private function __construct() { $this->db = Database::getInstance(); // Check if dompdf is available if (class_exists('Dompdf\Dompdf')) { $options = new Options(); $options->set('isRemoteEnabled', true); $options->set('isHtml5ParserEnabled', true); $options->set('isFontSubsettingEnabled', true); $options->set('defaultFont', 'Arial'); $options->set('chroot', ROOT_PATH); $this->dompdf = new Dompdf($options); } } public static function getInstance() { if (self::$instance === null) { self::$instance = new self(); } return self::$instance; } // ============================================ // ADMIT CARD GENERATION // ============================================ /** * Generate Admit Card */ public function generateAdmitCard($studentId, $examSession, $examType = 'final') { // Check if dompdf is available if (!$this->dompdf) { return ['success' => false, 'message' => 'PDF library not installed']; } // Fetch student data $student = $this->db->fetchOne( "SELECT s.*, c.course_name, c.course_code, c.duration_text as duration, u.institution_name, u.institution_code, ac.exam_centre, ac.exam_centre_address, ac.exam_date_from, ac.exam_date_to, ac.exam_timing, ac.admit_card_number FROM students s JOIN courses c ON s.course_id = c.id JOIN users u ON s.institution_id = u.id LEFT JOIN admit_cards ac ON s.id = ac.student_id AND ac.exam_session = ? AND ac.exam_type = ? WHERE s.id = ?", [$examSession, $examType, $studentId] ); if (!$student) { return ['success' => false, 'message' => 'Student not found']; } // Generate admit card number if not exists if (empty($student['admit_card_number'])) { $student['admit_card_number'] = 'ADMT' . date('Y') . str_pad($studentId, 6, '0', STR_PAD_LEFT); // Save to database $this->db->insert('admit_cards', [ 'student_id' => $studentId, 'admit_card_number' => $student['admit_card_number'], 'exam_session' => $examSession, 'exam_type' => $examType, 'exam_centre' => $student['exam_centre'] ?? 'To be announced', 'exam_centre_address' => $student['exam_centre_address'] ?? '', 'exam_date_from' => $student['exam_date_from'] ?? null, 'exam_date_to' => $student['exam_date_to'] ?? null, 'exam_timing' => $student['exam_timing'] ?? '10:00 AM - 1:00 PM', 'generated_at' => date('Y-m-d H:i:s'), 'generated_by' => $_SESSION['user_id'] ?? null, 'pdf_path' => '' // Will update after generation ]); } // Build HTML $html = $this->buildAdmitCardHTML($student); // Generate PDF $filename = generatePdfFilename('admit_card', $student['admit_card_number']); $filepath = PDF_GENERATED_PATH . 'admit_cards/' . $filename; $result = $this->generatePDF($html, $filename, $filepath); if ($result['success']) { // Update database with PDF path $this->db->update('admit_cards', ['pdf_path' => $filepath], [ 'student_id' => $studentId, 'exam_session' => $examSession, 'exam_type' => $examType ] ); } return $result; } /** * Build Admit Card HTML Template */ private function buildAdmitCardHTML($student) { $photoPath = !empty($student['photo_path']) ? $student['photo_path'] : 'assets/images/default-avatar.png'; $qrData = json_encode([ 'admit_card' => $student['admit_card_number'], 'roll' => $student['roll_number'], 'name' => $student['full_name'] ]); return " Admit Card - {$student['admit_card_number']}

Indian Board of Vocational & Technical Education

An Autonomous Body Recognized by Government of India

" . INSTITUTION_ADDRESS . "

EXAMINATION ADMIT CARD - " . strtoupper($student['exam_session']) . "
Student Photo
Admit Card No. {$student['admit_card_number']}
Registration No. {$student['registration_number']}
Roll Number " . formatRollNumber($student['roll_number']) . "
Student Name {$student['full_name']}
Father's Name {$student['father_name']}
Date of Birth " . formatDate($student['date_of_birth']) . "
Course {$student['course_name']} ({$student['course_code']})
Institution {$student['institution_name']}

Examination Schedule

Exam Centre {$student['exam_centre']}
Centre Address {$student['exam_centre_address']}
Exam Date " . formatDate($student['exam_date_from']) . " to " . formatDate($student['exam_date_to']) . "
Exam Timing {$student['exam_timing']}

Important Instructions:

  1. Bring this admit card and a valid photo ID proof to the examination center.
  2. Reach the examination center at least 30 minutes before the scheduled time.
  3. Electronic devices (mobile phones, calculators, smart watches) are strictly prohibited.
  4. Follow all COVID-19 guidelines issued by the examination authority.
  5. Any kind of malpractice will lead to disqualification.
Student Signature
QR Code
Scan to Verify
Controller of Examination

This admit card is computer generated and does not require signature.

For queries, contact: " . INSTITUTION_PHONE . " | Email: " . INSTITUTION_EMAIL . "

Generated on: " . formatDateTime(date('Y-m-d H:i:s')) . "

"; } // ============================================ // CERTIFICATE GENERATION // ============================================ /** * Generate Course Completion Certificate */ public function generateCertificate($studentId, $certificateType = 'course_completion') { if (!$this->dompdf) { return ['success' => false, 'message' => 'PDF library not installed']; } // Fetch student with result data $student = $this->db->fetchOne( "SELECT s.*, c.course_name, c.course_code, c.duration_text as duration, u.institution_name, u.institution_code FROM students s JOIN courses c ON s.course_id = c.id JOIN users u ON s.institution_id = u.id WHERE s.id = ? AND s.result_declared = 1", [$studentId] ); if (!$student) { return ['success' => false, 'message' => 'Student not found or result not declared']; } // Generate certificate number $certificateNumber = 'IBVTE/' . date('Y') . '/' . strtoupper(substr($certificateType, 0, 3)) . '/' . str_pad($studentId, 6, '0', STR_PAD_LEFT); // Build certificate HTML $html = $this->buildCertificateHTML($student, $certificateNumber, $certificateType); // Generate PDF $filename = generatePdfFilename('certificate', $certificateNumber); $filepath = PDF_GENERATED_PATH . 'certificates/' . $filename; $result = $this->generatePDF($html, $filename, $filepath, 'A4', 'landscape'); if ($result['success']) { // Save certificate record $this->db->insert('certificates', [ 'student_id' => $studentId, 'certificate_number' => $certificateNumber, 'certificate_type' => $certificateType, 'course_id' => $student['course_id'], 'session_year' => $student['session_year'], 'issue_date' => date('Y-m-d'), 'grade_obtained' => $this->getGradeFromPercentage($student['percentage']), 'division' => $student['division'], 'percentage' => $student['percentage'], 'qr_code_data' => json_encode(['cert' => $certificateNumber, 'verify' => APP_URL . 'verify.php?c=' . $certificateNumber]), 'verification_url' => APP_URL . 'verify.php?c=' . $certificateNumber, 'generated_at' => date('Y-m-d H:i:s'), 'generated_by' => $_SESSION['user_id'] ?? null, 'pdf_path' => $filepath ]); } return $result; } /** * Build Certificate HTML Template */ private function buildCertificateHTML($student, $certificateNumber, $type) { $divisionLabel = getDivisionLabel($student['division']); $grade = $this->getGradeFromPercentage($student['percentage']); $qrUrl = APP_URL . 'verify.php?c=' . $certificateNumber; $typeTitles = [ 'course_completion' => 'COURSE COMPLETION CERTIFICATE', 'diploma' => 'DIPLOMA CERTIFICATE', 'provisional' => 'PROVISIONAL CERTIFICATE', 'migration' => 'MIGRATION CERTIFICATE', 'character' => 'CHARACTER CERTIFICATE' ]; return " Certificate - {$certificateNumber}
IBVTE
Cert. No: {$certificateNumber}

Indian Board of Vocational & Technical Education

AN AUTONOMOUS BODY RECOGNIZED BY GOVERNMENT OF INDIA

" . INSTITUTION_ADDRESS . "

" . ($typeTitles[$type] ?? 'CERTIFICATE') . "

This is to certify that

{$student['full_name']}

Son/Daughter of {$student['father_name']}

has successfully completed the course

{$student['course_name']}

from {$student['institution_name']}

with {$divisionLabel} ({$student['percentage']}%)

in the session {$student['session_year']}

Registration Number: {$student['registration_number']} Roll Number: " . formatRollNumber($student['roll_number']) . "
Grade: {$grade} Duration: {$student['duration']}
Official
Seal
Verify Certificate
Scan to Verify
Controller of Examination
Date: " . formatDate(date('Y-m-d')) . "
Chairman
IBVTE
Secretary
IBVTE
Date of Issue: " . formatDate(date('Y-m-d')) . "
"; } // ============================================ // COMMON PDF GENERATION // ============================================ /** * Generate PDF from HTML */ private function generatePDF($html, $filename, $filepath, $paper = 'A4', $orientation = 'portrait') { try { $this->dompdf->loadHtml($html); $this->dompdf->setPaper($paper, $orientation); $this->dompdf->render(); // Save to file $output = $this->dompdf->output(); file_put_contents($filepath, $output); return [ 'success' => true, 'filename' => $filename, 'filepath' => $filepath, 'url' => str_replace(ROOT_PATH, APP_URL, $filepath) ]; } catch (Exception $e) { logError('PDF Generation Failed', ['error' => $e->getMessage(), 'filename' => $filename]); return ['success' => false, 'message' => 'PDF generation failed: ' . $e->getMessage()]; } } /** * Stream PDF to browser */ public function streamPDF($filepath, $filename = null) { if (!file_exists($filepath)) { return ['success' => false, 'message' => 'File not found']; } $filename = $filename ?? basename($filepath); header('Content-Type: application/pdf'); header('Content-Disposition: inline; filename="' . $filename . '"'); header('Content-Length: ' . filesize($filepath)); header('Cache-Control: private, no-cache, must-revalidate'); readfile($filepath); exit; } /** * Download PDF */ public function downloadPDF($filepath, $filename = null) { if (!file_exists($filepath)) { return ['success' => false, 'message' => 'File not found']; } $filename = $filename ?? basename($filepath); header('Content-Type: application/pdf'); header('Content-Disposition: attachment; filename="' . $filename . '"'); header('Content-Length: ' . filesize($filepath)); header('Cache-Control: private, no-cache, must-revalidate'); readfile($filepath); exit; } /** * Get grade from percentage */ private function getGradeFromPercentage($percentage) { if ($percentage >= 90) return 'A+'; if ($percentage >= 80) return 'A'; if ($percentage >= 70) return 'B+'; if ($percentage >= 60) return 'B'; if ($percentage >= 50) return 'C'; if ($percentage >= 40) return 'D'; return 'F'; } } /** * Helper function */ function PDF() { return PDFGenerator::getInstance(); }