PHP PDO transaction Rollback code Instance _php Tutorial

PHP PDO transaction Rollback code instance
$this->begintransaction ();
$this->exec (' Update people set age=2 ');

$step 1 = mysql tutorial _error ();//Your class, change to execute SQL error, get error code, corresponding function

$this->exec (' INSERT into course (course,num) VALUES ("math", 100) ');

$step 2 = mysql_error ();

if (! $step 1 &&! $step 2)
{
$this->commit ();
}
Else
{
$this->rollback ();
}

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