PHPBB <!-- IF something here OR something here -->

I am trying to do a simple if statement in PHPBB and I cannot figure out or find a solution to do an "or" in an if statement. I have found out how to find out if a member is a part of a certain group but now I need to find if the user belongs to either this group or that group.

I have tried

<!-- IF S_GROUP_ID == 12 || S_GROUP_ID == 5 -->

and I have tried

<!-- IF S_GROUP_ID == 12 or S_GROUP_ID == 5 -->

Am I missing something or can you not do an or in the IF statement...?

After trial / error I have found a solution

on includes/functions.php I needed to add

if ( !function_exists('group_memberships') )
    {
        include($phpbb_root_path . 'includes/functions_user.'.$phpEx);
    }
    $groups = group_memberships(false,$user->data['user_id']);
    foreach ($groups as $grouprec)
    {
        $template->assign_vars(array(
        'S_GROUP_' . $grouprec['group_id'] => true
        ));
    }

before

//The following assigns all_common_variables that may be used at any point in a template.

and on the .html template page I needed to do this:

<!-- IF S_GROUP_12 || S_GROUP_5 -->
...
<!-- ENDIF -->