使用相同的键合并两个数组 [英] Merging two arrays with the same keys

问题描述

我需要合并两个数组的帮助。假设我有以下数组：

I need a help with merging two arrays. Let's say I have following arrays:

Array
(
[3] => Array
    (
        [id] => 3
        [name] => Lorem
        [type] => pl
    )

[2] => Array
    (
        [id] => 2
        [name] => Ipsum
        [type] => pl
    )

)

第二个：

Array
(
    [6] => Sit dolor
    [4] => nostrud exercitation ullamco
    [3] => uuntur magni dolores
    [2] => corporis suscipit laboriosam
    [7] =>  quia non numquam eius modi tempora
 )

所需的输出为：

Array
(
[3] => Array
    (
        [id] => 3
        [name] => Lorem
        [type] => pl
        [new_key] => uuntur magni dolores
    )

[2] => Array
    (
        [id] => 2
        [name] => Ipsum
        [type] => pl
        [new_key] => corporis suscipit laboriosam
    )
)

我一直在尝试将数组与 array_diff_key（）方法，然后在某些循环中合并数组，但是我无法使其工作。有内置的PHP函数，还是我应该编写自己的函数？如果是这样，您能帮助我取得理想的结果吗？

I have been trying to compare arrays with array_diff_key() method and than merge arrays in some loop, but I could't get it working. Is there any built in PHP function, or should I write my own? If so, could you help me with getting desired result? Any help is much appreciated.

推荐答案

您可以简单地遍历第一个数组：

You can simply iterate over first array:

foreach ($arr1 as $key=> $item) {
    $arr1[$key]['new_key'] = isset($arr2[$item['id']]) ? $arr2[$item['id']] : '';
}

或

foreach ($arr1 as &$item) { //just for fun
    $item['new_key'] = isset($arr2[$item['id']]) ? $arr2[$item['id']] : '';
}

但是您的数据似乎来自数据库。如果我是对的，则最好使用sql JOIN 。

But it seems that your data comes from database. If I am right, you'd better use sql JOIN.

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