(no version information, might be only in CVS)
Initiates a transaction
( void )
Turns off autocommit mode. While autocommit mode is turned off, changes
made to the database via the PDO object instance are not committed until
you end the transaction by calling PDO::commit().
Calling PDO::rollback() will roll back all changes to
the database and return the connection to autocommit mode.
Some databases, including MySQL, automatically issue an implicit
COMMIT when a database definition language (DDL) statement such as
DROP TABLE or CREATE TABLE is issued within a transaction. The implicit
COMMIT will prevent you from rolling back any other changes within the