把以下代码加到flow.php文件（165行），$result['confirm_type'] = !empty($_CFG['cart_confirm']) ? $_CFG['cart_confirm'] : 2;的上面

/* 取得优惠活动 */

    $favourable_list = favourable_list($_SESSION['user_rank']);

 // 自动把赠品添加到购物车

 foreach($favourable_list as $v)

 {

if(!$v['available']) continue;

  /* 取得优惠活动信息 */

  $act_id = $v['act_id'];

  $favourable = favourable_info($act_id);

  /* 检查购物车中是否已有该优惠 */

  $cart_favourable = cart_favourable();

  if (favourable_used($favourable, $cart_favourable))

  {

   continue;

  }

  $gift = array();

  foreach($v['gift'] as $g)

  {

   $gift[] = $g['id'];

  }

  /* 赠品（特惠品）优惠 */

  if ($favourable['act_type'] == FAT_GOODS)

  {

   /* 检查是否已在购物车 */

   $sql = "SELECT goods_name" .

     " FROM " . $ecs->table('cart') .

     " WHERE session_id = '" . SESS_ID . "'" .

     " AND rec_type = '" . CART_GENERAL_GOODS . "'" .

     " AND is_gift = '$act_id'" .

     " AND goods_id " . db_create_in($gift);

   $gift_name = $db->getCol($sql);

   if (!empty($gift_name))

   {

    continue;

   }

   /* 检查数量是否超过上限 */

   $count = isset($cart_favourable[$act_id]) ? $cart_favourable[$act_id] : 0;

   if ($favourable['act_type_ext'] > 0 && $count + count($gift) > $favourable['act_type_ext'])

   {

    continue;

   }

   /* 添加赠品到购物车 */

   foreach ($favourable['gift'] as $g)

   {

    add_gift_to_cart($act_id, $g['id'], $g['price']);

   }

  }

 }