public function actionAlipayReturn()
{
//ali验证不允许有多余参数
if (isset($_GET['r'])) {
unset($_GET['r']);
}
$out_trade_no = $_GET['out_trade_no'];
$trade_no = $_GET['trade_no'];
$trade_status = $_GET['trade_status'];
global $sysSettings;
$alipay = new Alipay($sysSettings['payment']['aliPartner'], $sysSettings['payment']['aliKey']);
if ($alipay->verifyReturn()) {
$order = Order::model()->findByPk($out_trade_no);
$course = Course::model()->findByAttributes(array('entityId' => $order->produceEntityId));
// modified by wzh
if ($order->status == Order::ORDER_PAID) {
Yii::app()->user->setFlash('success', '购买成功！你已经成功选上课程');
}
$this->redirect(array('view', 'id' => $course->id));
} else {
throw new CHttpException(404, '验证错误！');
}
}