(Yaf >=1.0.0)
Yaf_Dispatcher::autoRender — Switch on/off autorendering
public Yaf_Dispatcher::autoRender ([ bool $flag ] ) : Yaf_Dispatcher
 Yaf_Dispatcher will render automatically after dispatches a incoming request, you can prevent the rendering by calling this method with flag true 
Note:
you can simply return
falsein a action to prevent the auto-rendering of that action
flag
bool
Note:
since 2.2.0, if this parameter is not given, then the current state will be renturned
Example #1 Yaf_Dispatcher::autoRender()example
<?php
class IndexController extends Yaf_Controller_Abstract {
     /* init method will be called as soon as a controller is initialized */ 
     public function init() {
         if ($this->getRequest()->isXmlHttpRequest()) {
             //do not call render for ajax request
             //we will outpu a json string
             Yaf_Dispatcher::getInstance()->autoRender(FALSE);
         }
     } 
}
?> The above example will output something similar to:
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    https://www.php.net/manual/en/yaf-dispatcher.autorender.php