Steps to reproduce:

1. create a host with out interface;
2. go to create item form;
3. choose DB monitoring item type;
4. leave default values or make sure they are wrong so that error will come from server and click "Test" to open item test form;
5. click "Get value" or "Get value and test" and make sure to get error from server;
6. click "Cancel" to close item test popup;
7. change item type to "SNMP agent" (yes no interface);
8. click "Test" again to open item test form;
9. observe errors in log:

   Invalid argument supplied for foreach() [zabbix.php:22 -> require_once() -> ZBase->run() -> ZBase->processRequest() -> CController->run() -> CControllerPopupItemTestEdit->doAction() -> CConfigFile->{closure}() in app\controllers\CControllerPopupItemTestEdit.php:250]
   Illegal string offset 'version' [zabbix.php:22 -> require_once() -> ZBase->run() -> ZBase->processRequest() -> ZBase->processResponseFinal() -> CView->getOutput() -> include() -> CConfigFile->{closure}() in app\views\popup.itemtestedit.view.php:127]