Yii (1) transaction, rollback and commit .

yii_transaction.php

$transaction = Yii::app()->db->beginTransaction();
try {
    if (!$model->save()) {
        throw new Exception('Model cannot be saved.');
    }
    if (!$anothermodel->save()) {
        throw new Exception('Anothermodel cannot be saved.');
    }

    $transaction->commit();
} catch (Exception $e) {
    $transaction->rollback();
}