Question

这是我的阵列。

Array
(
    [id] => 1
    [color] => "White"
    [something] => Array
    (
        [country] => "France"
        [city] => "Paris"
    )

)
Array
(
    [id] => 2
    [color] => "Black"
    [something] => Array
    (
        [country] => "Germany"
        [city] => "Berlin"
    )

)
Array
(
    [id] => 2
    [color] => "Red"
    [something] => Array
    (
        [country] => "Russia"
        [city] => "Moscow"
    )

)

我想将具有相同id值的数组分组。这应该是输出：

[0] => Array
(
    [0] => Array
    (
        [id] => 1
        [color] => "White"
        [something] => Array
        (
                [country] => "France"
                [city] => "Paris"
        )

    )

)
[1] => Array
(

    [0] => Array
    (
        [id] => 2
        [color] => "Black"
        [something] => Array
        (
            [country] => "Germany"
            [city] => "Berlin"
        )

    )
    [1] => Array
    (

        [id] => 2
        [color] => "Red"
        [something] => Array
        (
            [country] => "Russia"
            [city] => "Moscow"
        )

    )

)

我尝试了几十个foreach语句，但是我无法在同一个数组中获得具有相同id的数组。它可能与它是一个多维数组的事实有关吗？我应该使用2个嵌套foreach来获得结果吗？

Answer 1

使用id作为新数组的键。

$a[$array[id]][] = $array;

Answer 2

代码：

<?php

$arr = array(
    array(
        'id'    => 1,
        'color' => 'white',
        'something' => array(
            'country' => 'France',
            'city'    => 'Paris',
        ),
    ),
    array(
        'id'    => 2,
        'color' => 'Black',
        'something' => array(
            'country' => 'Germany',
            'city'    => 'Berlin',
        ),
    ),
    array(
        'id'    => 2,
        'color' => 'Red',
        'something' => array(
            'country' => 'Russia',
            'city'    => 'Moscow',
        ),
    ),
);


function groupify($arr) {
    $new = array();
    foreach ($arr as $item) {
        if (!isset($new[$item['id']])) {
            $new[$item['id']] = array();
        }
        $new[$item['id']][] = $item;
    }
    return $new;
}

print_r(groupify($arr));

结果：

Array
(
    [1] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [color] => white
                    [something] => Array
                        (
                            [country] => France
                            [city] => Paris
                        )

                )

        )

    [2] => Array
        (
            [0] => Array
                (
                    [id] => 2
                    [color] => Black
                    [something] => Array
                        (
                            [country] => Germany
                            [city] => Berlin
                        )

                )

            [1] => Array
                (
                    [id] => 2
                    [color] => Red
                    [something] => Array
                        (
                            [country] => Russia
                            [city] => Moscow
                        )

                )

        )

)

如果您不想保留密钥，只需在array_values之前致电return。

Answer 3

如果您想使用foreach：

<?php
$return = array();
foreach($array as $key => $innerArray) {
    $return[$innerArray['id']][]= $innerArray;
}

现在$ return包含按ID搜索的内容，其中键1和2是您的ID

array(
    1 => array(
        array(/** **/) 
    ),
    2 => array(
        array(/** **/),
        array(/** **/) 
    );
);

然后，您可以像这样访问您的群组：

foreach($return as $key => $groupArray) {
    // you have the groups here

    foreach($groupArray as $id => $singleArray) {
       // singleArray contains your id, colour etc
    }
}

foreach($return[1] as $groupOne) {
    // all arrays with id = 1
}

在同一个数组中移动具有相同值的数组

3 个答案: