PHP 8.1 using PDO with MySQL: Transactions not rolling back as expected
Hey everyone, I'm running into an issue that's driving me crazy. I’m currently working on a PHP 8.1 application where I need to use transactions with PDO to ensure data integrity during multiple queries. However, I'm working with an scenario where my transactions are not rolling back as expected when an exception occurs. I’ve set up my code as follows: ```php try { $pdo = new PDO('mysql:host=localhost;dbname=testdb', 'user', 'password'); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $pdo->beginTransaction(); // First query $stmt1 = $pdo->prepare('INSERT INTO users (username) VALUES (:username)'); $stmt1->execute([':username' => 'john_doe']); // Second query that fails $stmt2 = $pdo->prepare('INSERT INTO orders (user_id, amount) VALUES (:user_id, :amount)'); $stmt2->execute([':user_id' => 1, ':amount' => 50]); // Simulating an scenario with user_id // Commit if all goes well $pdo->commit(); } catch (Exception $e) { // This is where I expect the transaction to roll back $pdo->rollback(); echo 'Transaction failed: ' . $e->getMessage(); } ``` The question arises in the catch block where I expect a rollback to occur if any exception is thrown during the execution of my queries. However, even when the second query fails due to a foreign key constraint (as the user_id does not exist), the data from the first query still gets committed to the database. I checked the database settings and confirmed that foreign key checks are enabled. I also tried wrapping the prepare and execute calls within the same try block but still faced the same scenario. I’m not seeing any behavior messages indicating that the rollback didn’t happen, which makes it even more confusing. Is there something I'm missing in my transaction management with PDO? Any insights or suggestions would be greatly appreciated! This is part of a larger API I'm building. Thanks in advance!