_helper->layout->disableLayout(); $this->_helper->viewRenderer->setNoRender(); } public function graphgroupAction(){ $userIDsNamespace = Zend_Session::namespaceGet('userIDs'); if(isset($userIDsNamespace['groupID'])){ header("Content-Type: image/png"); header("Expires: 0"); $n = new Pbs_Graph(); $level = $this->_request->getParam('level'); if(is_numeric($level) && $level != ''){ $n->setHiglightLevel($level); } echo $n->graph($userIDsNamespace['groupID']); } } }