Fonction factorielle recursive

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/* Titre          : Fonction factorielle recursive                            */
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/* URL            : http://www.phpsources.org/scripts208-PHP.htm              */
/* Auteur         : PHP Sources                                               */
/* Date édition   : 30 Jan 2007                                               */
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?>

<?php

function factorielle($nbr) 
{ 
   if($nbr === 0) // condition d'arret 
      return 1;  
  else 
      return $nbr*factorielle($nbr-1); 
}  

?>