how to check if a variable is set in smarty template?

[LAMP]

is there a function that I can use inside smarty template if any value is assigned to a template variable? something like:

{if $variable === null }

{/if}

[fristi]

is there a function that I can use inside smarty template if any value is assigned to a template variable? something like:

{if $variable === null }

{/if}

manual: http://www.smarty.net/manual/en/lang...unction.if.php

Down in the examples you can see the following:

{if isset($name) && $name == 'Blog'}
     {* do something *}
{elseif $name == $foo}
    {* do something *}
{/if}

From that code I deduct that you need to to this:

{if !isset($variable)}

{/if}

PS: I have never used Smarty, need to learn new syntax for what you can do with PHP
edit
Reason why Smarty is too bulky http://www.sitepoint.com/article/bey...mplate-engine/
(if you are interested)

[LAMP]

The code you provided worked. Thanks.

Actually, I know that you can also use native PHP templating instead of Smarty. It's matter of taste and convinience. I find myself more productive with smarty.