Question

我有两个数组，我想将这两个数组合并为单个数组。请查看以下详细信息：

First Array：

Array
(
    [0] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
        )

    [1] => Array
        (
            [a] => 4
            [b] => 5
            [c] => 6
        )
    [2] => Array
        (
            [a] => 7
            [b] => 8
            [c] => 9
        )
)

第二阵列：

Array
(
    [0] => Array
        (
            [d] => 100

        )

    [1] => Array
        (
            [d] => 200

        )
    [2] => Array
        (
            [d] => 300

        )
)

我想要这个结果。有人知道怎么做吗？

Array
(
    [0] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 100
        )

    [1] => Array
        (
            [a] => 4
            [b] => 5
            [c] => 6
            [d] => 200
        )
    [2] => Array
        (
            [a] => 7
            [b] => 8
            [c] => 9
            [d] => 300
        )

    )

希望你能理解这个问题。提前谢谢。

编辑：当我使用array_merge_recursive（）时，我得到这个结果：

Array
    (
    [0] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
        )

    [1] => Array
        (
            [a] => 4
            [b] => 5
            [c] => 6
        )
    [2] => Array
        (
            [a] => 7
            [b] => 8
            [c] => 9
        )

    [3] => Array
        (
            [d] => 100

        )

    [4] => Array
        (
            [d] => 200

        )
    [5] => Array
        (
            [d] => 300

        )
)

帮助！

Answer 1

使用递归合并：

array_merge_recursive($array1, $array2);

Answer 2

循环通过辅助数组
检查主数组中是否存在辅助密钥
- 如果是，请合并它们。

代码

foreach($arr2 as $intKey => $arrElement) {
    if(array_key_exists($intKey, $arr1)) {
        $arr1[$intKey] = array_merge($arr1[$intKey], $arrElement);
    }
}

例如;

<?php

$arr1 = array( 0 => array("a" => 1,
                          "b" => 2,
                          "c" => 3
                         ),
                1 => array("a" => 1,
                        "b" => 2,
                        "c" => 3
                ),
                2 => array("a" => 1,
                        "b" => 2,
                        "c" => 3
                ),
    );

$arr2 = array( 0 => array("d" => 4
                         ),
                1 => array("d" => 4
                ),
                2 => array("d" => 4
                ),
    );


foreach($arr2 as $intKey => $arrElement) {
    if(array_key_exists($intKey, $arr1)) {
        $arr1[$intKey] = array_merge($arr1[$intKey], $arrElement);
    }
}

echo "<pre>";
print_r( $arr1 );
echo "</pre>";

输出：

> Array (
>     [0] => Array
>         (
>             [a] => 1
>             [b] => 2
>             [c] => 3
>             [d] => 4
>         )
> 
>     [1] => Array
>         (
>             [a] => 1
>             [b] => 2
>             [c] => 3
>             [d] => 4
>         )
> 
>     [2] => Array
>         (
>             [a] => 1
>             [b] => 2
>             [c] => 3
>             [d] => 4
>         )
> 
> )

在PHP中合并两个数组的困难

2 个答案:

代码

例如;