Not completely. It will show the text if $smart is set and has a “positive value”. For example, if $smart is set to false the text won’t show.
Please be aware that doing it this way can cause an E_NOTICE warning if $smart isn’t set at all. Better would be to check for isset($smart) to check if it has any value, or !empty($smart) to check check if it has any value and that value is not negative.
You may want to look those up in da manual: [fphp]isset[/fphp], [fphp]empty[/fphp]