SMARTY_DIR
     This should be the full system path
     to the location of the Smarty
     class files. If this is not defined, then Smarty will attempt to
     determine the appropriate value automatically. If defined, the path
     must end with a slash.
    
Example 11-1. SMARTY_DIR 
<?php // set path to Smarty directory *nix style define('SMARTY_DIR', '/usr/local/lib/php/Smarty/libs/');
  // path to Smarty windows style define('SMARTY_DIR', 'c:/webroot/libs/Smarty/libs/');
  // include the smarty class Note 'S' is upper case require_once(SMARTY_DIR . 'Smarty.class.php'); ?>
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  | 
  See also
  $smarty.const
  and
  $php_handling constants