/**
  * Constructor
  *
  * @see WPDB::__construct() for description of parameters.
  */
 function __construct($dbuser, $dbpassword, $dbname, $dbhost)
 {
     parent::__construct($dbuser, $dbpassword, $dbname, $dbhost);
     $args = func_get_args();
     $args = call_user_func_array(array(&$this, 'init'), $args);
     if ($args['host']) {
         $this->db_servers['dbh_global'] = $args;
     }
 }