What security measures should be implemented in a PHP reservation system to prevent race conditions and ensure data integrity?

Race conditions can occur in a PHP reservation system when multiple users try to access and modify the same data simultaneously, leading to data inconsistency and integrity issues. To prevent race conditions, you can implement locking mechanisms like database transactions or file locking to ensure that only one user can modify the data at a time. 

// Example of using a database transaction to prevent race conditions
try {
    $pdo->beginTransaction();

    // Perform reservation update or insert operation here

    $pdo->commit();
} catch (PDOException $e) {
    $pdo->rollBack();
    // Handle the exception
}

Keywords

race conditions data integrity security measures PHP reservation system prevent

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