{nocache} is used to disable caching of a template section. 
   Every {nocache} must be paired with a matching
   {/nocache}.
  
Be sure any variables used within a non-cached section are also assigned from PHP when the page is loaded from the cache.
Example 7.60. Preventing a template section from being cached
Today's date is
{nocache}
{$smarty.now|date_format}
{/nocache}
   
The above code will output the current date on a cached page.
See also the caching section.