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/**
* Process Payment
* Handle payment allocation and database transactions
*/
require_once 'db_config.php';
// Initialize response
$success = false;
$message = '';
$paymentDetails = [];
try {
// Validate POST data
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
throw new Exception('Invalid request method');
}
$studentId = $_POST['student_id'] ?? '';
$studentCode = $_POST['student_code'] ?? '';
$selectedFeesJson = $_POST['selected_fees'] ?? '';
$tellerNumber = $_POST['teller_number'] ?? '';
$bankDescription = $_POST['bank_description'] ?? '';
$paymentDate = $_POST['payment_date'] ?? '';
$amountToUse = floatval($_POST['amount_to_use'] ?? 0);
// Validate required fields
if (
empty($studentId) || empty($studentCode) || empty($selectedFeesJson) ||
empty($tellerNumber) || empty($paymentDate) || $amountToUse <= 0
) {
throw new Exception('Missing required fields');
}
// Parse selected fees
$selectedFees = json_decode($selectedFeesJson, true);
if (!is_array($selectedFees) || count($selectedFees) === 0) {
throw new Exception('No fees selected');
}
// Sort fees by academic_session ASC, term_of_session ASC (oldest to newest)
usort($selectedFees, function ($a, $b) {
if ($a['academic_session'] != $b['academic_session']) {
return $a['academic_session'] - $b['academic_session'];
}
return $a['term_of_session'] - $b['term_of_session'];
});
// Re-fetch bank statement to verify
$sql = "SELECT
bs.id,
bs.description,
bs.amount_paid,
bs.payment_date,
COALESCE(fp.total_registered_fee, 0.00) AS registered_amount,
(bs.amount_paid - COALESCE(fp.total_registered_fee, 0.00)) AS unreconciled_amount
FROM tb_account_bank_statements bs
LEFT JOIN (
SELECT teller_no, SUM(amount_paid) AS total_registered_fee
FROM tb_account_school_fee_payments
GROUP BY teller_no
) fp ON SUBSTRING_INDEX(bs.description, ' ', -1) = fp.teller_no
WHERE SUBSTRING_INDEX(bs.description, ' ', -1) = :teller_number
LIMIT 1";
$stmt = $pdo->prepare($sql);
$stmt->execute(['teller_number' => $tellerNumber]);
$bankStatement = $stmt->fetch();
if (!$bankStatement) {
throw new Exception('Bank statement not found for teller number: ' . $tellerNumber);
}
// Verify unreconciled amount
if ($amountToUse > $bankStatement['unreconciled_amount']) {
throw new Exception('Amount exceeds unreconciled amount on teller');
}
// Extract teller name and number from description
$descParts = explode(' ', $bankStatement['description']);
$tellerNo = array_pop($descParts);
$tellerName = implode(' ', $descParts);
// Use the oldest fee's session/term for transaction_id
$dominantSession = $selectedFees[0]['academic_session'];
$dominantTerm = $selectedFees[0]['term_of_session'];
// Generate transaction_id
$transactionId = $studentId . $dominantSession . $paymentDate;
// STEP 1: Guard check - prevent duplicate payments on same date
$sql = "SELECT COUNT(*) AS cnt
FROM tb_account_school_fee_sum_payments
WHERE student_id = :student_id
AND payment_date = :payment_date";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'student_id' => $studentId,
'payment_date' => $paymentDate
]);
$duplicateCheck = $stmt->fetch();
if ($duplicateCheck['cnt'] > 0) {
throw new Exception('A payment for this student has already been registered on this date (' . $paymentDate . ')');
}
// STEP 2: Allocate payment across fees (oldest to newest)
$feeAllocations = [];
$remainingAmount = $amountToUse;
foreach ($selectedFees as $fee) {
if ($remainingAmount <= 0) {
break;
}
$outstandingAmount = floatval($fee['outstanding_amount']);
if ($remainingAmount >= $outstandingAmount) {
// Fully settle this fee
$amountForThisFee = $outstandingAmount;
$remainingAmount -= $outstandingAmount;
} else {
// Partially settle this fee
$amountForThisFee = $remainingAmount;
$remainingAmount = 0;
}
$feeAllocations[] = [
'fee_id' => $fee['fee_id'],
'academic_session' => $fee['academic_session'],
'term_of_session' => $fee['term_of_session'],
'amount' => $amountForThisFee
];
}
if (count($feeAllocations) === 0) {
throw new Exception('No fees could be allocated');
}
// Calculate total paid
$totalPaid = array_sum(array_column($feeAllocations, 'amount'));
// STEP 3: Begin database transaction
$pdo->beginTransaction();
try {
// Constants
$creditBankId = '000001373634585148';
$debitBankId = '514297805530965017';
$paymodeId = '000001373901891416';
$recipientId = 'SS0011441283890434';
$paymentBy = 'SS0011441283890434';
$createdBy = 'SS0011441283890434';
$createdAs = 'school';
$paymentStatus = 'Approved';
$paymodeCategory = 'BANK';
// Generate receipt_no (used across all fee records)
$receiptNo = $studentCode . $paymentDate;
// 3a) INSERT into tb_account_school_fee_payments (per fee)
foreach ($feeAllocations as $allocation) {
$schoolFeePaymentId = $studentCode . $allocation['fee_id'] . $paymentDate; //original code
//$schoolFeePaymentId = $allocation['fee_id'] . $paymentDate; //Is used to reduce length of id to solve duplicate entry error.
$sql = "INSERT INTO tb_account_school_fee_payments (
id, fee_id, student_id, transaction_id, amount_paid,
teller_no, teller_name, credit_bank_id, debit_bank_id,
paymode_id, payment_status, payment_date, recipient_id,
academic_session, term_of_session, payment_by, payment_on
) VALUES (
:id, :fee_id, :student_id, :transaction_id, :amount_paid,
:teller_no, :teller_name, :credit_bank_id, :debit_bank_id,
:paymode_id, :payment_status, :payment_date, :recipient_id,
:academic_session, :term_of_session, :payment_by, NOW()
)";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'id' => $schoolFeePaymentId,
'fee_id' => $allocation['fee_id'],
'student_id' => $studentId,
'transaction_id' => $transactionId,
'amount_paid' => $allocation['amount'],
'teller_no' => $tellerNo,
'teller_name' => $tellerName,
'credit_bank_id' => $creditBankId,
'debit_bank_id' => $debitBankId,
'paymode_id' => $paymodeId,
'payment_status' => $paymentStatus,
'payment_date' => $paymentDate,
'recipient_id' => $recipientId,
'academic_session' => $allocation['academic_session'],
'term_of_session' => $allocation['term_of_session'],
'payment_by' => $paymentBy
]);
}
// 3b) INSERT into tb_account_school_fee_sum_payments (single record)
$sumPaymentsId = $studentId . $dominantSession . $paymentDate;
$sql = "INSERT INTO tb_account_school_fee_sum_payments (
id, student_id, total_paid, paymode_id, payment_date,
credit_bank_id, debit_bank_id, transaction_id, status,
academic_session, term_of_session, registered_by, registered_on
) VALUES (
:id, :student_id, :total_paid, :paymode_id, :payment_date,
:credit_bank_id, :debit_bank_id, :transaction_id, :status,
:academic_session, :term_of_session, :registered_by, NOW()
)";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'id' => $sumPaymentsId,
'student_id' => $studentId,
'total_paid' => $totalPaid,
'paymode_id' => $paymodeId,
'payment_date' => $paymentDate,
'credit_bank_id' => $creditBankId,
'debit_bank_id' => $debitBankId,
'transaction_id' => $transactionId,
'status' => $paymentStatus,
'academic_session' => $dominantSession,
'term_of_session' => $dominantTerm,
'registered_by' => $createdBy
]);
// 3c) INSERT into tb_account_student_payments (per fee)
foreach ($feeAllocations as $allocation) {
// Get current payment_to_date (sum of all previous payments for this fee/session/term)
$sql = "SELECT SUM(payment_to_date) AS current_total
FROM tb_account_student_payments
WHERE student_id = :student_id
AND fee_id = :fee_id
AND academic_session = :academic_session
AND term_of_session = :term_of_session";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'student_id' => $studentId,
'fee_id' => $allocation['fee_id'],
'academic_session' => $allocation['academic_session'],
'term_of_session' => $allocation['term_of_session']
]);
$currentPayment = $stmt->fetch();
$currentTotal = floatval($currentPayment['current_total'] ?? 0);
$newPaymentToDate = $allocation['amount'];
//$newPaymentToDate = $currentTotal + $allocation['amount']; --Old code that added new payment amount to current total (total before payment)
$studentPaymentId = $studentCode . $allocation['fee_id'] . $paymentDate;
$sql = "INSERT INTO tb_account_student_payments (
id, fee_id, student_id, payment_to_date, transaction_id,
academic_session, term_of_session, created_by, created_as, created_on
) VALUES (
:id, :fee_id, :student_id, :payment_to_date, :transaction_id,
:academic_session, :term_of_session, :created_by, :created_as, NOW()
)";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'id' => $studentPaymentId,
'fee_id' => $allocation['fee_id'],
'student_id' => $studentId,
'payment_to_date' => $newPaymentToDate,
'transaction_id' => $transactionId,
'academic_session' => $allocation['academic_session'],
'term_of_session' => $allocation['term_of_session'],
'created_by' => $createdBy,
'created_as' => $createdAs
]);
}
// 3d) INSERT into tb_account_payment_registers (per fee)
foreach ($feeAllocations as $allocation) {
$paymentRegisterId = $studentCode . $allocation['fee_id'] . $paymentDate;
$sql = "INSERT INTO tb_account_payment_registers (
id, fee_id, student_id, amount_paid, amount_due,
receipt_no, recipient_id, payment_date, paymode_category,
transaction_id, academic_session, term_of_session,
created_by, created_as, created_on
) VALUES (
:id, :fee_id, :student_id, :amount_paid, :amount_due,
:receipt_no, :recipient_id, :payment_date, :paymode_category,
:transaction_id, :academic_session, :term_of_session,
:created_by, :created_as, NOW()
)";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'id' => $paymentRegisterId,
'fee_id' => $allocation['fee_id'],
'student_id' => $studentId,
'amount_paid' => $allocation['amount'],
'amount_due' => $allocation['amount'],
'receipt_no' => $receiptNo,
'recipient_id' => $recipientId,
'payment_date' => $paymentDate,
'paymode_category' => $paymodeCategory,
'transaction_id' => $transactionId,
'academic_session' => $allocation['academic_session'],
'term_of_session' => $allocation['term_of_session'],
'created_by' => $createdBy,
'created_as' => $createdAs
]);
}
// 3e) UPDATE tb_student_logistics
// Group allocations by session/term to update specific records
$sessionTermTotals = [];
foreach ($feeAllocations as $allocation) {
$key = $allocation['academic_session'] . '-' . $allocation['term_of_session'];
if (!isset($sessionTermTotals[$key])) {
$sessionTermTotals[$key] = [
'academic_session' => $allocation['academic_session'],
'term_of_session' => $allocation['term_of_session'],
'total' => 0
];
}
$sessionTermTotals[$key]['total'] += $allocation['amount'];
}
// Update each session/term record
foreach ($sessionTermTotals as $st) {
$sql = "UPDATE tb_student_logistics
SET fees_outstanding = GREATEST(0, fees_outstanding - :total_paid)
WHERE student_id = :student_id
AND academic_session = :academic_session
AND term_of_session = :term_of_session";
$stmt = $pdo->prepare($sql);
$stmt->execute([
'total_paid' => $st['total'],
'student_id' => $studentId,
'academic_session' => $st['academic_session'],
'term_of_session' => $st['term_of_session']
]);
}
// Commit transaction
$pdo->commit();
$success = true;
$message = 'Payment processed successfully!';
// Fetch fee descriptions for display
$feeIds = array_column($feeAllocations, 'fee_id');
$placeholders = implode(',', array_fill(0, count($feeIds), '?'));
$sql = "SELECT id, description FROM tb_account_school_fees WHERE id IN ($placeholders)";
$stmt = $pdo->prepare($sql);
$stmt->execute($feeIds);
$feeDescriptions = $stmt->fetchAll(PDO::FETCH_KEY_PAIR);
// Prepare payment details for display
foreach ($feeAllocations as $key => $allocation) {
$feeAllocations[$key]['description'] = $feeDescriptions[$allocation['fee_id']] ?? 'Unknown Fee';
}
$paymentDetails = [
'student_code' => $studentCode,
'payment_date' => $paymentDate,
'teller_no' => $tellerNo,
'teller_name' => $tellerName,
'total_paid' => $totalPaid,
'receipt_no' => $receiptNo,
'transaction_id' => $transactionId,
'allocations' => $feeAllocations,
'remaining_unreconciled' => $bankStatement['unreconciled_amount'] - $totalPaid
];
} catch (Exception $e) {
$pdo->rollBack();
throw new Exception('Transaction failed: ' . $e->getMessage());
}
} catch (Exception $e) {
$success = false;
$message = $e->getMessage();
}
// Fetch student name for display
$studentName = '';
if (!empty($studentId)) {
try {
$sql = "SELECT CONCAT(last_name, ' ', first_name, ' ', COALESCE(other_name, '')) AS full_name
FROM tb_student_registrations
WHERE id = :student_id";
$stmt = $pdo->prepare($sql);
$stmt->execute(['student_id' => $studentId]);
$result = $stmt->fetch();
$studentName = $result['full_name'] ?? 'Unknown Student';
} catch (Exception $e) {
$studentName = 'Unknown Student';
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Payment Processing Result</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
min-height: 100vh;
padding: 20px;
display: flex;
align-items: center;
justify-content: center;
}
.container {
max-width: 800px;
width: 100%;
background: white;
border-radius: 12px;
box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
padding: 40px;
}
.success-icon {
width: 80px;
height: 80px;
margin: 0 auto 20px;
background: #28a745;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
color: white;
font-size: 48px;
}
.error-icon {
width: 80px;
height: 80px;
margin: 0 auto 20px;
background: #dc3545;
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
color: white;
font-size: 48px;
}
h1 {
text-align: center;
color: #333;
margin-bottom: 10px;
font-size: 28px;
}
.message {
text-align: center;
color: #666;
margin-bottom: 30px;
font-size: 16px;
}
.details-section {
background: #f8f9fa;
padding: 20px;
border-radius: 8px;
margin-bottom: 20px;
}
.details-section h2 {
color: #333;
margin-bottom: 15px;
font-size: 20px;
}
.detail-row {
display: flex;
justify-content: space-between;
padding: 10px 0;
border-bottom: 1px solid #ddd;
}
.detail-row:last-child {
border-bottom: none;
}
.detail-label {
font-weight: 600;
color: #555;
}
.detail-value {
color: #333;
text-align: right;
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 15px;
}
th,
td {
padding: 12px;
text-align: left;
border-bottom: 1px solid #ddd;
}
th {
background-color: #667eea;
color: white;
font-weight: 600;
}
.amount {
text-align: right;
font-family: 'Courier New', monospace;
}
.total-row {
font-weight: bold;
background-color: #f0f0f0;
}
.btn {
display: inline-block;
padding: 12px 30px;
border: none;
border-radius: 6px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
text-decoration: none;
transition: all 0.3s;
text-align: center;
}
.btn-primary {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
}
.btn-primary:hover {
transform: translateY(-2px);
box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}
.actions {
text-align: center;
margin-top: 30px;
}
.highlight {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
padding: 15px;
border-radius: 8px;
margin-bottom: 20px;
}
.highlight p {
margin: 5px 0;
}
</style>
</head>
<body>
<div class="container">
<?php if ($success): ?>
<div class="success-icon">✓</div>
<h1>Payment Processed Successfully!</h1>
<p class="message"><?php echo htmlspecialchars($message); ?></p>
<div class="highlight">
<p><strong>Student:</strong> <?php echo htmlspecialchars($studentName); ?></p>
<p><strong>Receipt No:</strong> <?php echo htmlspecialchars($paymentDetails['receipt_no']); ?></p>
<p><strong>Transaction ID:</strong> <?php echo htmlspecialchars($paymentDetails['transaction_id']); ?></p>
</div>
<div class="details-section">
<h2>Payment Details</h2>
<div class="detail-row">
<span class="detail-label">Payment Date:</span>
<span class="detail-value"><?php echo htmlspecialchars($paymentDetails['payment_date']); ?></span>
</div>
<div class="detail-row">
<span class="detail-label">Teller Number:</span>
<span class="detail-value"><?php echo htmlspecialchars($paymentDetails['teller_no']); ?></span>
</div>
<div class="detail-row">
<span class="detail-label">Bank Narration:</span>
<span class="detail-value"><?php echo htmlspecialchars($paymentDetails['teller_name']); ?></span>
</div>
<div class="detail-row">
<span class="detail-label">Total Amount Used:</span>
<span class="detail-value">₦<?php echo number_format($paymentDetails['total_paid'], 2); ?></span>
</div>
<div class="detail-row">
<span class="detail-label">Remaining Unreconciled on Teller:</span>
<span
class="detail-value">₦<?php echo number_format($paymentDetails['remaining_unreconciled'], 2); ?></span>
</div>
</div>
<div class="details-section">
<h2>Fees Settled</h2>
<table>
<thead>
<tr>
<th>Fee Description</th>
<th width="100">Session</th>
<th width="80">Term</th>
<th width="120" class="amount">Amount Paid</th>
</tr>
</thead>
<tbody>
<?php foreach ($paymentDetails['allocations'] as $allocation): ?>
<tr>
<td><?php echo htmlspecialchars($allocation['description']); ?></td>
<td><?php echo htmlspecialchars($allocation['academic_session']); ?></td>
<td><?php echo htmlspecialchars($allocation['term_of_session']); ?></td>
<td class="amount">₦<?php echo number_format($allocation['amount'], 2); ?></td>
</tr>
<?php endforeach; ?>
<tr class="total-row">
<td colspan="3" style="text-align: right;">Total:</td>
<td class="amount">₦<?php echo number_format($paymentDetails['total_paid'], 2); ?></td>
</tr>
</tbody>
</table>
</div>
<?php else: ?>
<div class="error-icon">✗</div>
<h1>Payment Processing Failed</h1>
<p class="message" style="color: #dc3545;"><?php echo htmlspecialchars($message); ?></p>
<div class="details-section">
<h2>Error Details</h2>
<p>The payment could not be processed. No changes were made to the database.</p>
<p style="margin-top: 10px;"><strong>Error:</strong> <?php echo htmlspecialchars($message); ?></p>
</div>
<?php endif; ?>
<div class="actions">
<a href="index.php" class="btn btn-primary">Return to Main Page</a>
<?php if ($success && !empty($paymentDetails['receipt_no'])): ?>
<a href="download_receipt.php?receipt_no=<?php echo urlencode($paymentDetails['receipt_no']); ?>"
class="btn btn-primary" style="background: #28a745; margin-left: 10px;">Download Receipt</a>
<?php endif; ?>
</div>
</div>
</body>
</html> |