关于zencart产品页面上一个，下一个产品链接问题的解决方法

可以看到向上按钮和向下按钮处都使用了变量ID

$previous

$next_item

$previous

$next_item

 $previous_query = "select products_name from " . TABLE_PRODUCTS_DESCRIPTION . " 

                       where products_id = '" . (int)$previous . "'

                       and language_id = '" . (int)$_SESSION['languages_id'] . "'";

      $previous_info = $db->Execute($previous_query);

 

      $previous_name = $previous_info->fields['products_name'];

 

 $next_query = "select products_name from " . TABLE_PRODUCTS_DESCRIPTION . " 

                       where products_id = '" . (int)$next_item . "'

                       and language_id = '" . (int)$_SESSION['languages_id'] . "'";

      $next_info = $db->Execute($next_query);

 

      $next_name = $next_info->fields['products_name'];