smarty while-loop error

The official docs says that smarty has 'while' support . However I do in template the following:

{while $foo > 0}
  {$foo--}
{/while}

and I get the following error :

syntax error: unrecognized tag 'while' (Smarty_Compiler.class.php)

Can you please help with that issue ? Thanks a lot开发者_如何学JAVA.

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You are probably using an old version (without while) of smarty, that's why you get the error

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As @RC said, you are probably using Smarty v2. If you can't upgrade to v3, you'd want to look at {section} or maybe {foreach} for looping.