Today I hit an error in the PDO transaction-handling part: Fatal error: Uncaught exception ‘PDOException’ with message ‘There is no active transaction’ in /data/www/web.passport/pay/classes/class.Mydb.php:145 Stack trace: #0 /data/www/web.passport/pay/classes/class.Mydb.php(145): PDO->rollBack() #1 /data/www/web.passport/pay/yeepayOrder.php(138): Mydb->transaction(Array) #2 {main} thrown in /data/www/web.passport/pay/classes/class.Mydb.php on line 145 Looking through the error log I saw: