显示订单的PHP购物车

Hy

我正在创建一个PHP商店用于培训目的。我希望用户能够查看他最近下的订单，但我很难意识到这一点

我的数据库中有以下表：

客户（孩子、姓名、地址等）
产品（pid、产品名称、产品描述、价格）
订单-->oid、kid、付款、地址、状态
订单详细信息-->oid、日期、pid、数量）

好的，我已经创建了一个函数，查询从数据库中获取所需的数据

function showOrder($kid)
{
$db = database();
$orders = $db->query ("SELECT * FROM orders
    INNER JOIN order_detail on orders.oid=order_detail.oid
    INNER JOIN products on order_detail.pid = products.pid
    WHERE kid='$kid' ");

$orders = $orders->fetchAll();

$lastoid = 0;
foreach($orders as $i){

    while($lastoid != $i['oid']) {
        $lastoid = $i['oid'];
        echo "Ordernr: ".$lastoid."<br/>";
        echo "Produktname: ".$i['product_name']."<br>";
        echo "Menge: ".$i['quantity']."<br/>";
        echo "Preis: ".$i['price']."<br/>";
        echo "Status: ".$i['status']."<br/>";
        echo "<br/><br/><hr/>";    
    }
}
}

---

问题是您没有从产品表中进行选择。您的select查询只是

orders.*

，它只不过是

orders表

下的所有列。解决方案是将products列添加到select查询中。我不太清楚为什么要显式使用内部联接，我的是这样的：

Array
(
[0] => Array
    (
        [oid] => 1
        [0] => 1
        [kid] => 1
        [1] => 1
        [2] => 1
        [date] => 2012-04-17
        [3] => 2012-04-17
        [pid] => 1
        [4] => 1
        [quantity] => 2
        [5] => 2
        [payment] => Nachnahme
        [6] => Nachnahme
        [street] => teststraße
        [7] => teststraße
        [number] => 2
        [8] => 2
        [zip] => 2222
        [9] => 2222
        [city] => Teststadt
        [10] => Teststadt
        [status] => in Bearbeitung
        [11] => in Bearbeitung
        [12] => 1
        [product_name] => Acer Laptop
        [13] => Acer Laptop
        [price] => 29.00
        [14] => 29.00
        [details] => blabla
        [15] => blabla
        [category] => Laptop
        [16] => Laptop
        [date_added] => 2012-04-05
        [17] => 2012-04-05
    )

[1] => Array
    (
        [oid] => 1
        [0] => 1
        [kid] => 1
        [1] => 1
        [2] => 1
        [date] => 2012-04-17
        [3] => 2012-04-17
        [pid] => 2
        [4] => 2
        [quantity] => 2
        [5] => 2
        [payment] => Nachnahme
        [6] => Nachnahme
        [street] => teststraße
        [7] => teststraße
        [number] => 2
        [8] => 2
        [zip] => 2222
        [9] => 2222
        [city] => Teststadt
        [10] => Teststadt
        [status] => in Bearbeitung
        [11] => in Bearbeitung
        [12] => 2
        [product_name] => Grundig TV
        [13] => Grundig TV
        [price] => 22.00
        [14] => 22.00
        [details] => blabla

        [15] => blabla
        [category] => TV
        [16] => TV
        [date_added] => 2012-04-05
        [17] => 2012-04-05
    )

[2] => Array
    (
        [oid] => 1
        [0] => 1
        [kid] => 1
        [1] => 1
        [2] => 1
        [date] => 2012-04-17
        [3] => 2012-04-17
        [pid] => 7
        [4] => 7
        [quantity] => 1
        [5] => 1
        [payment] => Nachnahme
        [6] => Nachnahme
        [street] => teststraße
        [7] => teststraße
        [number] => 2
        [8] => 2
        [zip] => 2222
        [9] => 2222
        [city] => Teststadt
        [10] => Teststadt
        [status] => in Bearbeitung
        [11] => in Bearbeitung
        [12] => 7
        [product_name] => Nokia Handy
        [13] => Nokia Handy
        [price] => 69.00
        [14] => 69.00
        [details] => blabla
        [15] => blabla
        [category] => Handy
        [16] => Handy
        [date_added] => 2012-04-06
        [17] => 2012-04-06
    )

[3] => Array
    (
        [oid] => 2
        [0] => 2
        [kid] => 1
        [1] => 1
        [2] => 2
        [date] => 2012-04-17
        [3] => 2012-04-17
        [pid] => 8
        [4] => 8
        [quantity] => 1
        [5] => 1
        [payment] => Vorauskasse
        [6] => Vorauskasse
        [street] => musterstraße
        [7] => musterstraße
        [number] => 1
        [8] => 1
        [zip] => 1111
        [9] => 1111
        [city] => stadt
        [10] => stadt
        [status] => in Bearbeitung
        [11] => in Bearbeitung
        [12] => 8
        [product_name] => PC groß
        [13] => PC groß
        [price] => 66.00
        [14] => 66.00
        [details] => blabla
        [15] => blabla
        [category] => Computer
        [16] => Computer
        [date_added] => 2012-04-06
        [17] => 2012-04-06
    )
)  

select orders.*, products.* from orders,order_detail,products where 
orders.oid=order_detail.oid and order_detail.pid=products.pid and orders.kid=1

以下是我得到的结果：

| oid | kid | pid | product_name |
|  1  |  1  |  1  | camera       |
|  1  |  1  |  2  | pants        |

---

您的代码进入while循环

$lastoid = 0;

它将运行第一个while循环，因为$lastoid不等于$i['oid']。一个是零，另一个是一。在下一行中，将$i['oid']的值指定给$lastoid。这使它们相等，while循环将停止。如果循环不中断，您将有一个无休止的相同信息行。在while循环中，没有对下一个订单的引用

像这样改变它

$lastoid = 1;
foreach($orders as $key => $value){

    if($lastoid == $value[$key]['oid']) {
        echo "Ordernr: ".$lastoid."<br/>";
        echo "Produktname: ".$i['product_name']."<br>";
        echo "Menge: ".$i['quantity']."<br/>";
        echo "Preis: ".$i['price']."<br/>";
        echo "Status: ".$i['status']."<br/>";
        echo "<br/><br/><hr/>";    
    } else {
        $lastoid = $value[$key+1]['oid'];
    }
}

$lastoid=1；
foreach（$key=>$value的订单）{
如果（$lastoid==$value[$key]['oid']）{
echo“Ordernr:.$lastoid.”
；
echo“Produktname:”.$i['product_name'].“
”；
echo“Menge:.$i['quantity']。”
；
echo“Preis:”.$i[“价格]”
；
回显“状态：.”i['Status']。“
”；
回声“

”；
}否则{
$lastoid=$value[$key+1]['oid']；
}
}

只需注意：使用

fetchAll（PDO:：FETCH_ASSOC）相反，如果您只使用关联键，它将节省内存和迭代速度。我尝试了您的语句，但出现了一个db错误。从products表中，我得到了足够的信息，我想我想创建一个具有以下结构的表：orderid | product name | quantity | price | status如果订单只包含一种产品（在我的例子中是oid 1），那么创建表没有问题-但是oid2包含3种产品，首先我只在其中获得1种产品，因为我从未尝试过数据查询，所以有一些拼写错误现在已经修复。另一件事是
订单
表格
order
是mysql中的保留字。我把它改成了订单。我试着对你上面发布的结构进行了查询，结果返回了编辑后的答案中提到的两行。