Are there any potential pitfalls to be aware of when using isset in Smarty templates?

When using isset in Smarty templates, it's important to be aware that it may not work as expected for certain variables, especially if they are not assigned within the template itself. To ensure that isset works correctly, it's recommended to assign the variable in the PHP code before passing it to the template.

```php
// PHP code snippet
$variable = 'value';
$smarty->assign('variable', $variable);
```

This way, the variable will be set in the PHP code and can be checked with isset in the Smarty template without any potential pitfalls.