将变量值转成大写字母。
等同于PHP的
strtoupper()函数。
Example 5.23. upper
<?php
$smarty->assign('articleTitle', "If Strike isn't Settled Quickly it may Last a While.");
?>
模板：
{$articleTitle}
{$articleTitle|upper}
输出：
If Strike isn't Settled Quickly it may Last a While. IF STRIKE ISN'T SETTLED QUICKLY IT MAY LAST A WHILE.
参见
lower
和
capitalize.