【问题标题】：PHP group multidimensional array to process each group of array independentlyPHP分组多维数组独立处理每组数组
【发布时间】：2020-12-28 08:06:52
【问题描述】：

我正在开发一种独特的基于群组的购物车系统，该系统的工作方式与传统购物车系统不同。对于购物车，我得到包含 group_id 的行。我想按group_id 对所有订单进行分组并处理其数据以计算动态定价、商品总数、折扣等等。

我要显示的数据是供管理员使用datatables 使用的。所以我无法使用 group_id 过滤器运行查询。我必须显示所有为管理员分组数据。

我得到如下查询结果。

查询结果

Array
(
    [0] => stdClass Object
        (
            [id] => 14
            [order_number] => 2020111629863
            [group_order_number] => 1605497369298
            [product] => 297
            [product_option] => 0
            [qty] => 3
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 63
            [customers] => [{"name":"Roma Patel","email":"roma@pad.com","qty":"1"},{"name":"Manoj Bajpai","email":"manoj@skdf.com","qty":"2"}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-26 10:39:13
        )

    [1] => stdClass Object
        (
            [id] => 15
            [order_number] => 2020111618475
            [group_order_number] => 1605498753184
            [product] => 174
            [product_option] => 0
            [qty] => 1
            [group_id] => 184
            [group_admin] => 71
            [group_user] => 75
            [customers] => [{"name":"Loveena","email":"love@sdklf.com","qty":1}]
            [identifier] => FqPeYG6L2FVMQFGM_990314138546b9b5ce73df287919ca0a
            [added_at] => 2020-11-16 07:52:33
        )

    [2] => stdClass Object
        (
            [id] => 16
            [order_number] => 2020111629863
            [group_order_number] => 1605497369298
            [product] => 168
            [product_option] => 0
            [qty] => 1
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 63
            [customers] => [{"name":"Roma Patel","email":"roma@pad.com","qty":1}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-15 12:18:23
        )

    [3] => stdClass Object
        (
            [id] => 17
            [order_number] => 2020111629863
            [group_order_number] => 1605497369298
            [product] => 64
            [product_option] => 0
            [qty] => 2
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 63
            [customers] => [{"name":"Rinku Patani","email":"rinku@patani.com","qty":"2"}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-22 12:27:46
        )

    [4] => stdClass Object
        (
            [id] => 18
            [order_number] => 2020111629873
            [group_order_number] => 1605497369298
            [product] => 64
            [product_option] => 0
            [qty] => 1
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 73
            [customers] => [{"name":"Vijay Sonar","email":"vson@aksd.com","qty":"1"}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-24 10:51:00
        )

    [5] => stdClass Object
        (
            [id] => 19
            [order_number] => 2020111618475
            [group_order_number] => 1605498753184
            [product] => 102
            [product_option] => 0
            [qty] => 1
            [group_id] => 184
            [group_admin] => 71
            [group_user] => 75
            [customers] => [{"name":"Rima Lagu","email":"rima@lagosd.com","qty":1}]
            [identifier] => FqPeYG6L2FVMQFGM_990314138546b9b5ce73df287919ca0a
            [added_at] => 2020-12-24 13:01:14
        )

    [6] => stdClass Object
        (
            [id] => 20
            [order_number] => 2020111629873
            [group_order_number] => 1605497369298
            [product] => 146
            [product_option] => 0
            [qty] => 2
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 73
            [customers] => [{"name":"Ramesh Oza","email":"ramesh@amdf.com","qty":"2"}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-26 10:01:44
        )

    [7] => stdClass Object
        (
            [id] => 21
            [order_number] => 2020111629873
            [group_order_number] => 1605497369298
            [product] => 297
            [product_option] => 1
            [qty] => 3
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 73
            [customers] => [{"name":"Aniketh Vora","email":"aniket@sdfk.com","qty":"3"}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-26 10:31:55
        )

    [8] => stdClass Object
        (
            [id] => 23
            [order_number] => 2020111629863
            [group_order_number] => 1605497369298
            [product] => 146
            [product_option] => 0
            [qty] => 3
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 63
            [customers] => [{"name":"Roma Patel","email":"roma@pad.com","qty":1},{"name":"vijay sonar","email":"vso@lkd.com","qty":2}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-26 10:48:33
        )

    [9] => stdClass Object
        (
            [id] => 24
            [order_number] => 2020111629863
            [group_order_number] => 1605497369298
            [product] => 297
            [product_option] => 1
            [qty] => 2
            [group_id] => 298
            [group_admin] => 72
            [group_user] => 63
            [customers] => [{"name": "Harprit Sing", "email": "harpr@sfk.co", "qty": 1}, {"name": "Roma Patel", "email": "roma@pad.com", "qty": 1}]
            [identifier] => AtR4deAVgU4Ensi1_1ac2b33a4df7c5f0cf148d6232074352
            [added_at] => 2020-12-26 10:56:34
        )

)

我已根据group_id 将所有项目分组如下。

按组 ID 分组的项目

问题

我必须为每个组进行各种计算和处理数据。例如，通过计算该组的每个订单（行）来计算该组的总产品数——该组的总折扣。

所以在这里，我想知道如何分别处理每个组（索引）。就好像我为分组数组运行 for-each 循环一样，它一次运行所有组。并且不会得到正确的总和。

例如，

计算群组298, 184, ... 的产品总数，以此类推。我已将所有方法设置为使用数组中的所有 id 进行计算。

如果您需要更多详细信息或信息，请告诉我。

更新信息

数据库表

数据表列

最终结果将显示在下面的数据表中。每组一行。

【问题讨论】：

如果您通过查询获取所有行，只需在迭代期间进行这些计算。如果没有，例如您有分页，请使用 GROUP BY 的附加查询
代替 foreach ($result as $group) 使用 foreach ($result['product'] as $group
@HTMHell 我想要整个组的总数。不适用于单个行。例如，如果组 id 298 有三个订单，我需要获取同一组的三个订单的总项目数。折扣、总金额等相同。如何计算和分离每个组的结果？因为datatables 每行将是一组总数据。
@m47730 products 键是我手动添加的。我有更多数据将分配给另一个（兄弟）键。
你的意图不够清楚。向我们展示一个最小的数据库数据示例，以及您希望它如何显示（包括所有总和）

标签： php arrays foreach

【解决方案1】：

我不确定这是否是你想要的，正如@HTMHell 所建议的那样，这种操作在数据库上更快。

<?php

foreach ($result as $id => $group)
{
    $sum = 0;
    foreach ($group as $row)
    {
        $sum += $row['qty']
    }

    echo "group $id total qty: $sum";
}

【讨论】：