<?php

$smarty->assign('articleTitle', 'Dealers Will Hear Car Talk at Noon.');
$smarty->assign('email', '');

?>

模板：

{$articleTitle|default:'no title'}
{$myTitle|default:'no title'}
{$email|default:'No email address available'}

輸出：

Dealers Will Hear Car Talk at Noon.
no title
No email address available