// Connecting to the database $dsn = 'mysql:host=localhost;dbname=example'; $username = 'username'; $password = 'password'; try { $pdo = new PDO($dsn, $username, $password); } catch (PDOException $e) { echo 'Connection failed: ' . $e->getMessage(); } // Begin a transaction $pdo->beginTransaction(); // Perform database operations // ... // If an error occurs, roll back the transaction $pdo->rollBack(); // If everything was successful, commit the transaction $pdo->commit();The package library for this method is the PDO library, which is a database abstraction layer that provides a consistent interface for interacting with different database systems.