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cancel_ticket.php
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cancel_ticket.php
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<!DOCTYPE html>
<html>
<head>
<title>Error</title>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="./css/style.css">
<link href="https://fonts.googleapis.com/css2?family=Poppins:400,600&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Lato:300;400;700&display=swap" rel="stylesheet">
</head>
<body>
<header>
<nav>
<div class="container flex items-center justify-center">
<div class="left flex items-center">
<!--Logo and links -->
<div class="branding">
<img src="./images/logo.svg" alt="">
</div>
<div>
<a href="index.php">Home</a>
<a href="trains-information.php">Trains Information</a>
<a href="view-cancel-tickets.php">View or Cancel Ticket</a>
</div>
</div>
<div class="right">
<!--Contact Button -->
<a href="trains-status.php"><button class="btn-nb btn-nb-primary">Book Ticket</button></a>
</div>
</div>
</nav>
</header>
<main>
<!-- Display the error message and sad emoji -->
<div class="error-message">We have successfully cancelled your booking!</div>
<div class="sad-emoji"></div>
</main>
</body>
</html>
<?php
include_once 'dbconnection.php';
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$ticket_id = $_POST['ticket_id'];
function cancel($ticket_id)
{
// Retrieve the passenger record from the database
global $conn;
$query = "SELECT * FROM passenger WHERE ticket_id = $ticket_id";
$result = mysqli_query($conn, $query);
if (mysqli_num_rows($result) > 0) {
// There is a record for this ticket_id
$row = mysqli_fetch_assoc($result);
// Delete the record from the passenger table
$query = "DELETE FROM passenger WHERE ticket_id = $ticket_id";
mysqli_query($conn, $query);
// Search for the first record with a waiting status for the same train and same category
$query = "SELECT * FROM passenger WHERE status = 'w' AND train_number = {$row['train_number']} AND category = '{$row['category']}' LIMIT 1";
$waiting_result = mysqli_query($conn, $query);
if (mysqli_num_rows($waiting_result) > 0) {
$waiting_record = mysqli_fetch_assoc($waiting_result);
// Change the status of the waiting record to confirm
$query = "UPDATE passenger SET status = 'c' WHERE ticket_id = {$waiting_record['ticket_id']}";
mysqli_query($conn, $query);
//train_status - wait_seats
$query = "SELECT * FROM train_status WHERE train_number = {$row['train_number']} AND train_date = '{$row['booked_date']}'";
$train_result = mysqli_query($conn, $query);
if (mysqli_num_rows($train_result) > 0) {
$train_row = mysqli_fetch_assoc($train_result);
$wait_seats = $train_row['wait_seats'] + 1;
$query = "UPDATE train_status SET wait_seats = $wait_seats WHERE train_number = {$row['train_number']} AND train_date = '{$row['booked_date']}'";
mysqli_query($conn, $query);
}
// train_status - wait_seats
} else {
// Update the train_status table
$query = "SELECT * FROM train_status WHERE train_number = {$row['train_number']} AND train_date = '{$row['booked_date']}'";
$train_result = mysqli_query($conn, $query);
if (mysqli_num_rows($train_result) > 0) {
// Update the booked seats in the train_status table
$train_row = mysqli_fetch_assoc($train_result);
if ($row['category'] == 'AC') {
$booked_ac_seats = $train_row['booked_ac_seats'] - 1;
$query = "UPDATE train_status SET booked_ac_seats = $booked_ac_seats WHERE train_number = {$row['train_number']} AND train_date = '{$row['booked_date']}'";
mysqli_query($conn, $query);
} else {
$booked_general_seats = $train_row['booked_general_seats'] - 1;
$query = "UPDATE train_status SET booked_general_seats = $booked_general_seats WHERE train_number = {$row['train_number']} AND train_date = '{$row['booked_date']}'";
mysqli_query($conn, $query);
}
}
}
} else {
// No record found with the given ticket ID
return "No record found with ticket ID: $ticket_id";
}
}
cancel($ticket_id);
?>