O Guia Definitivo do Yii 1.1

In the above, we declare the method getPrice to be a Web service API by marking it with
the tag @soap in its doc comment. We rely on doc comment to specify the data type of the
input parameters and return value. Additional APIs can be declared in the similar way.
Declaring Web Service Action
Having defined the service provider, we need to make it available to clients. In particular,
we want to create a controller action to expose the service. This can be done easily by
declaring a CWebServiceAction action in a controller class. For our example, we will just
put it in StockController.
class StockController extends CController
{
public function actions()
{
return array(
'quote'=>array(
'class'=>'CWebServiceAction',
),
);
}
}
/**
* @param string the symbol of the stock
* @return float the stock price
* @soap
*/
public function getPrice($symbol)
{
//...return stock price for $symbol
}
That is all we need to create a Web service! If we try to access the action by URL http://
hostname/path/to/index.php?r=stock/quote, we will see a lot of XML content which is
actually the WSDL for the Web service we defined.
Tip: By default, CWebServiceAction assumes the current controller is the service
provider. That is why we define the getPrice method inside the StockController class.
Consuming Web Service