Smarty : Variable Modifiers ( count_words )

This is used to count the number of words in a variable.
Example : count_words

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

Where template is:

{$articleTitle}
{$articleTitle|count_words}

This will output:

Dealers Will Hear Car Talk at Noon.
7