php - 如果键相同，如何组合两个数组并将其分块

Question

我正在使用 Laravel 构建一个应用程序，但我遇到了一个问题，我在 php 中有两个数组:

Array1
(
    [0] => 15
    [1] => 15
    [2] => 16
    [3] => 16
    [4] => 17
    [5] => 17
    [6] => 17
    [7] => 17
)

Array2
(
    [0] => 0
    [1] => 1
    [2] => 1
    [3] => 2
    [4] => 0
    [5] => 1
    [6] => 2
    [7] => 3
)

在这种情况下，我不能使用 array_chunk，因为 array2 的值​​是动态的，并且如果我组合它， array1 的键一定不能相同，所以，我如何将它组合成这样:

Array
(
    [15] => Array
        (
            [0] => 0
            [1] => 1
        )

    [16] => Array
        (
            [0] => 1
            [1] => 2
        )

    [17] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 2
            [3] => 3
        )

)

Answer 1

简单的foreach循环:

$arr1 = [15,15,16,16,17,17,17,17];
$arr2 = [0,1,1,2,0,1,2,3];

$result = [];
foreach($arr1 as $k => $v){
    $result[$v][] = $arr2[$k]; 
}

print_r($result);

输出:

Array
(
    [15] => Array
        (
            [0] => 0
            [1] => 1
        )

    [16] => Array
        (
            [0] => 1
            [1] => 2
        )

    [17] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 2
            [3] => 3
        )
)