大家都知道ECShop會員退出登錄同時會把已經加入購物車里的商品清空掉，通過本內容做修改即可實現會員退出登錄同時保留原購物車里面的商品不清空。

1. 打開includes/cls_session.php文件

搜索如下代碼：

$this->db->query('DELETE FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE session_id = '$this->session_id'");

把代碼修改為：

$this->db->query('DELETE FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE session_id = '$this->session_id' AND user_id = 0");

2. 打開includes/lib_main.php文件

搜索如下代碼：

function update_user_info()

在改函數內部末尾添加如下代碼：

/* 更新用戶購物車，退出不清空購物車 */

$sql = "UPDATE " .$GLOBALS['ecs']->table('cart'). " SET".

" user_id = '" . $_SESSION['user_id'] . "'".

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

$GLOBALS['db']->query($sql);

$sql = "UPDATE " . $GLOBALS['ecs']->table('cart') . " SET".

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

" WHERE user_id = '" . $_SESSION['user_id'] . "'";

$GLOBALS['db']->query($sql);

/* 刪除購物車中已下架的商品 */

$sql = "SELECT DISTINCT(c.goods_id) FROM " .$GLOBALS['ecs']->table('cart').

" AS c left JOIN " .$GLOBALS['ecs']->table('goods').

" AS g on c.goods_id = g.goods_id WHERE g.is_on_sale = 0 AND c.user_id = '" . $_SESSION['user_id'] . "'";

$data = $GLOBALS['db'] ->getAll($sql);

if($data){

foreach ($data as $k=>$v){

$sql = "DELETE FROM " .$GLOBALS['ecs']->table('cart'). " WHERE goods_id = '" . $v['goods_id'] . "'";

$GLOBALS['db'] -> query($sql);

}

}