This is used to uppercase a variable.
Example 5-21. upper
<?php$smarty->assign('articleTitle', "If Strike isn't Settled Quickly it may Last a While.");?>
where template is:
{$articleTitle} {$articleTitle|upper}
This will output:
If Strike isn't Settled Quickly it may Last a While. IF STRIKE ISN'T SETTLED QUICKLY IT MAY LAST A WHILE.
See also lower and capitalize.