ISSN (print) and ISSN (ejournal)

Feature Requests
11

Hi,
I am using ojs 3.1.0 with MySQL and PHP 5.6 in local and I trying to print a list of specific journals.
I add my Handler in Application
I created a ClassDAO with functions to search journals.
I created a Handler and called My class DAO and it returns my journals like this:

$mytest = $testDAO->getPrintIssnJournals($args,$request);

$templateMgr = TemplateManager::getManager($request);
$templateMgr->assign('mytest',$mytest);
$templateMgr->display('frontend/pages/test.tpl');

In my templates/frontend/pages/test.tpl

How can I print all the journals with printIssn and onlineIssn in a new page (test.tpl)?
I tried to use {iterate from=journals item=journal} {$journal->getSetting(‘printIssn’);} but it isn’t working.No errors
I activated errors in my config.inc.php and php.ini

error_reporting=E_ALL & ~E_DEPRECATED & ~E_STRICT

What do I missing?
How can I display errors in my templates with smarty ?

I followed this links:
https://pkp.sfu.ca/wiki/index.php?title=Front-end_Cookbook

https://forum.pkp.sfu.ca/t/displaying-issn-nr-at-site-homepage/3917/2

https://forum.pkp.sfu.ca/t/displaying-issn-nr-at-site-homepage/3917/3
Regards,
xavi.