HY，
我正在为培训目的创建一个PHP商店。我希望用户可以查看他放置的最后一个订单 - 但我有意识到这一点。
我在我的数据库中有这些表：
客户（孩子，姓名，地址，......）
产品（pid，product_name，product_description，price）
订单 - ＆gt; oid，孩子，付款，地址，状态
order_detail - ＆gt; oid，date，pid，quantity）
好的，我已经创建了一个函数，其中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/>";
}
}
}
我想做什么： 列出表中的单个订单（ - ＆gt; oderid |产品名称|数量|价格|状态） 如果订单只包含一个产品，但如果订单变大（2个产品），则仅显示第一个产品。
$ database看起来像这样：
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
)
)
答案 0 :(得分：0)
问题是您没有从产品表中进行选择。您选择的查询只是orders.*，只不过是orders table下的所有列。解决方案是将产品列添加到您的选择查询中。我不太清楚为什么你明确地使用内连接，我会是这样的：
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 |
答案 1 :(得分：0)
您的代码使用
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，另一个是一个。在下一行中，您将$ i ['oid']的值分配给$ lastoid。这使它们相等，你的while循环将停止。如果循环不会中断，那么您将获得无穷无尽的相同信息。在while循环中没有对下一个订单的引用。
像这样改变
$lastoid = 1;
foreach($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'];
}
}