在特定键上合并两个多维数组 [英] Merging two multidimensional arrays on specific key

问题描述

假设我有以下数组:

Array
    (
        [0] => Array
            (
                [id] => 5
                [name] => Education
            )

        [1] => Array
            (
                [id] => 4
                [name] => Computers
            )

        [3] => Array
            (
                [id] => 7
                [name] => Science

        [4] => Array
            (
                [id] => 1
                [name] => Sports
            )
    )

第二个:

Array
    (
        [0] => Array
            (
                [id] => 1
                [title] => Sport
            )

        [1] => Array
            (
                [id] => 7
                [title] => Sci
            )

        [3] => Array
            (
                [id] => 4
                [title] => Comp

        [4] => Array
            (
                [id] => 5
                [title] => Edu
            )
    )

所需的输出是:

Array
    (
        [0] => Array
            (
                [id] => 5
                [name] => Education
                [title] => Edu
            )

        [1] => Array
            (
                [id] => 4
                [name] => Computers
                [title] => Comp
            )

        [3] => Array
            (
                [id] => 7
                [name] => Science
                [title] => Sci

        [4] => Array
            (
                [id] => 1
                [name] => Sports
                [title] => Sport
            )
    )

我已经设法将这些数组与简单地合并:

I have managed to merge these arrays with simply:

foreach($first as $key => $value){
    $result[$key] = array_merge($first[$key], $second[$key]);
}

但是输出没有正确组合:

But the output is not combined correctly:

Array
    (
        [0] => Array
            (
                [id] => 5
                [name] => Education
                [title] => Sport
            )

        [1] => Array
            (
                [id] => 4
                [name] => Computers
                [title] => Sci
            )

        [3] => Array
            (
                [id] => 7
                [name] => Science
                [title] => Comp

        [4] => Array
            (
                [id] => 1
                [name] => Sports
                [title] => Edu
            )
    )

问题是我想在相同的 id 上合并这些数组.所需的输出排序应与第一个数组中的排序相同.

The problem is I would like to merge these arrays on the same id. Desired output sorting should be same as in the first array.

我怎样才能做到这一点?非常感谢任何帮助.

How can I achieve this? Any help is much appreciated.

推荐答案

你可以做一个嵌套循环并检查 id 值是否匹配，然后将 title 添加到$first(或 name 到 $second)

You can just do a nested loop and check if the id values match, then add title to $first (or name to $second)

foreach($first as $key => $value){
    foreach($second as $value2){
        if($value['id'] === $value2['id']){
            $first[$key]['title'] = $value2['title'];
        }               
    }
}

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