clearAllCache() — clears the entire template cache
void clearAllCache(int expire_time);As an optional parameter, you can supply a minimum age in seconds the cache files must be before they will get cleared.
Example 14.9. clearAllCache
<?php // clear the entire cache $smarty->clearAllCache(); // clears all files over one hour old $smarty->clearAllCache(3600); ?>
  See also
  clearCache(),
  isCached()
  and the
  caching page.