我想根据一个公共列值合并两个数组。这是我的 2 个数组:
$array1 = [
[
"total_process_per_category" => "6",
"category_id" => "1"
],
[
"total_process_per_category" => "2",
"category_id" => "2"
]
];
$array2 = [
[
"total_pinned_per_category" => "16",
"category_id" => "1"
],
[
"total_pinned_per_category" => "4",
"category_id" => "2"
]
];
我想合并这些数组以获得:
array (
0 =>
array (
'total_process_per_category' => '6',
'total_pinned_per_category' => '16',
'category_id' => '1',
),
1 =>
array (
'total_process_per_category' => '2',
'total_pinned_per_category' => '4',
'category_id' => '2',
),
)
如您所见,这两个数组具有相同的键 ['category_id'] 和相同的值。
我想根据它们的 ['category_id'] 值将 ['total_process_per_category] 和 ['total_pinned_per_category'] 放在同一个数组上。
我用嵌套的foreach得到了这个,但它看起来很丑。 请告诉我一个更好的方法。
你可以试试array_reduce
:
$someVariable = 'someValue';
$result = array_reduce(array_merge($array1, $array2), function ($carry, $item) use ($someVariable) {
if (isset($carry[$item['category_id']])) {
$carry[$item['category_id']] = array_merge($carry[$item['category_id']], $item);
} else {
$carry[$item['category_id']] = $item;
}
return $carry;
}, array());
var_dump($result);
这可以在没有"丑陋的嵌套foreach"的情况下完成。在迭代之前合并两个数组,按category_id值分组。 循环后,用 array_values()
清除临时的第一级键。
代码: (演示) (array_reduce() 版本)
$result = [];
foreach (array_merge($array1, $array2) as $row) {
$result[$row['category_id']] = ($result[$row['category_id']] ?? []) + $row;
}
var_export(array_values($result));
输出:
array (
0 =>
array (
'total_process_per_category' => '6',
'category_id' => '1',
'total_pinned_per_category' => '16',
),
1 =>
array (
'total_process_per_category' => '2',
'category_id' => '2',
'total_pinned_per_category' => '4',
),
)
你想要这样的东西吗:
foreach ( $array1 as $index => $value ) {
$mergeArray[] = [ $value, $array2[$index]];
}