You can apply any number of modifiers to a variable. They will be
  applied in the order they are combined, from left to right. They must
  be separated with a | (pipe) character.
 
Example 6.1. combining modifiers
<?php
$smarty->assign('articleTitle', 'Smokers are Productive, but Death Cuts Efficiency.');
?>
where template is:
{$articleTitle}
{$articleTitle|upper|spacify}
{$articleTitle|lower|spacify|truncate}
{$articleTitle|lower|truncate:30|spacify}
{$articleTitle|lower|spacify|truncate:30:". . ."}
  
The above example will output:
Smokers are Productive, but Death Cuts Efficiency. S M O K E R S A R ....snip.... H C U T S E F F I C I E N C Y . s m o k e r s a r ....snip.... b u t d e a t h c u t s... s m o k e r s a r e p r o d u c t i v e , b u t . . . s m o k e r s a r e p. . .