What are common pitfalls when using transactions in PHP with MySQL?

Common pitfalls when using transactions in PHP with MySQL include not properly handling exceptions within the transaction, not committing or rolling back the transaction appropriately, and not setting the appropriate transaction isolation level. To avoid these pitfalls, make sure to wrap your transaction code in a try-catch block, commit the transaction if it is successful, roll back the transaction if an exception occurs, and set the desired isolation level before beginning the transaction. 

<?php
// Establish a connection to the database
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');

try {
    // Begin a transaction
    $pdo->beginTransaction();

    // Set the desired transaction isolation level
    $pdo->exec("SET TRANSACTION ISOLATION LEVEL READ COMMITTED");

    // Perform your database operations within the transaction

    // Commit the transaction if successful
    $pdo->commit();
} catch (Exception $e) {
    // Roll back the transaction if an exception occurs
    $pdo->rollBack();
    echo "Transaction failed: " . $e->getMessage();
}
?>

Keywords

MySQL PHP transactions ACID concurrency

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