What potential pitfalls should be considered when developing a seat allocation feature for a concert ticket sales system using PHP and MySQL?

One potential pitfall to consider when developing a seat allocation feature for a concert ticket sales system is ensuring that seats are allocated accurately and efficiently to prevent double booking or overbooking. It is important to properly handle concurrency issues to avoid conflicts when multiple users are trying to reserve seats simultaneously. Additionally, the system should have error handling mechanisms in place to handle any unexpected issues that may arise during the seat allocation process.

// Example PHP code snippet for handling seat allocation in a concert ticket sales system

// Check if the selected seat is available
function isSeatAvailable($seat_id) {
    // Query the database to check if the seat is available
    // Return true if the seat is available, false otherwise
}

// Reserve a seat for a user
function reserveSeat($seat_id, $user_id) {
    // Begin a database transaction
    // Check if the seat is available
    // If available, update the database to reserve the seat for the user
    // Commit the transaction
    // Handle any exceptions or errors that may occur during the process
}