public function getinvoiceitemsAction() { $data = array(); $request = $this->getRequest()->getParams(); $invoice_id = isset($request['invoice_id']) ? $request['invoice_id'] : 0; if ($invoice_id > 0) { $items = new Erp_Model_Purchse_Invoiceitems(); $data = $items->getData($invoice_id); } echo Zend_Json::encode($data); exit; }