php数组查找重复项，总结它们&删除重复项

问题描述

我有一个数组:

Array
(
[0] => Array
    (
        [setid] => 2
        [income] => 100
    )

[1] => Array
    (
        [setid] => 2
        [income] => 120
    )

[2] => Array
    (
        [setid] => 3
        [income] => 700
    )
)

我需要找到具有相同 setid 的条目，总结他们的收入并删除重复的条目 - 最后它应该是这样的:

i need to find entrys with the same setid, sum their income up and delete duplicate entrys - in the end it should look like this:

Array
(
[0] => Array
    (
        [setid] => 2
        [income] => 220
    )

[1] => Array
    (
        [setid] => 3
        [income] => 700
    )
)

有人知道我的问题的复杂解决方案，还是我必须走很长的路并手动完成每一步?

does someone know a sophosticated solution for my problem or do i have to take the long road and do every step manually?

感谢和问候

推荐答案

只需创建一个新数组，您可以使用 setid 作为键快速寻址该数组.并在最后重新索引数组.

Just create a new array which you make fast adressable by using the setid as key. And reindex the array at the end.

$result = array();
foreach ($array as $val) {
    if (!isset($result[$val['setid']]))
        $result[$val['setid']] = $val;
    else
        $result[$val['setid']]['income'] += $val['income'];
}
$result = array_values($result); // reindex array

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