how the get the length of array from smarty

From: Date: Thu, 29 Sep 2005 11:56:44 +0000
Subject: how the get the length of array from smarty
Groups: php.smarty.dev 
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hi, i have an array in the template file $users, how can i determin the length of this array, so that if the length is zero i can output some desc strings. And another question is how can i determine if the variable is NULL? Thanks, James

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