基于多个值合并多维数组中的数组

Question

[
    0 => [
        'qty' => 10
        'section' => 'VK7B'
        'time_window' => 1
    ]
    1 => [
        'qty' => 1
        'section' => 'STIC'
        'time_window' => 1
    ]
    2 => [
        'qty' => 1
        'section' => 'STIC'
        'time_window' => 1
    ]
]

我有这个多维数组，如果 section 和 time_window 相同，我想在其中合并数组，然后对该数组的 qty 求和。执行此操作的优雅方法是什么？

我试过这个（$sections 是多维数组），但这会更改键并且只检查一个值：

$new = []
foreach ($sections as $s) {
   if (isset($new[$s['section']])) {
        $new[$s['section']]['qty'] += $s['qty'];
        $new[$s['section']]['time_window'] = $s['time_window'];
    } else {
        $new[$s['section']] = $s;
    }
}

[
    'VK7B' => [
        'qty' => 10
        'section' => 'VK7B'
        'time_window' => 1
    ]
    'STIC' => [
        'qty' => 2
        'section' => 'STIC'
        'time_window' => 1
    ]
]

Answer 1

正如@RiggsFolly 在评论中所指出的，您没有检查 time_window 是否相同。

您可以使用以下代码完成：

$new = []
foreach ($sections as $s) {
   // you need to save both values (section and time_window) to check both of them
   if (isset($new[$s['section'].$s['time_window']])) {
        $new[$s['section'].$s['time_window']]['qty'] += $s['qty'];
        $new[$s['section'].$s['time_window']]['time_window'] = $s['time_window'];
    } else {
        $new[$s['section'].$s['time_window']] = $s;
    }
}

// Now $new is an associative array => let's transform it in a normal array
$new = array_values($new);

基于多个值合并多维数组中的数组

Merge arrays in multidimensional array based on multiple values

php

arrays

merge

multidimensional-array

array-merge