MySQL Deadlock Detection via PHP

Question

What is the best-practice in dealing with MySQL Dead-Locks in PHP? Should I wrap all database calls in a try{}catch{} block and look for the DeadLock error code from the dat

Answer 1

I'd like to quote these warm words from MySQL's How to Cope with Deadlocks

Always be prepared to re-issue a transaction if it fails due to deadlock. Deadlocks are not dangerous. Just try again.

This could be achieved with a pattern like this:

for ($i = 3; true; $i--) {
    $pdo->beginTransaction();
    try {

        // Do the unit of work

        $pdo->commit();
        break;

    } catch (\PDOException $e) {
        $pdo->rollback();
        if ($i <= 0) {
            throw $e;
        }
    }
}