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