如何在 PHP 中填充另一个数组？ [复制]

Question

我有两个数组：

第一个有水果组合：

Array
(
    [Apple] => Array
        (
            [Pineaple] => 4
            [Strawberry] => 1
        )

    [Watermelon] => Array
        (
            [Peach] => 3
        )

)

第二个是这个，它是空的，因为我想从第一个存储：

Array
(
    [Apple] => Array
        (
            [Pineaple] => 0
            [Strawberry] => 0
            [Watermelon] => 0
            [Peach] => 0
        )

    [Watermelon] => Array
        (
            [Pineaple] => 0
            [Strawberry] => 0
            [Watermelon] => 0
            [Peach] => 0
        )
)

我想像这样将信息传递给第二个数组。它必须具有水果的所有组合和发生次数。

Array
(
    [Apple] => Array
        (
            [Pineaple] => 4
            [Strawberry] => 1
            [Watermelon] => 0
            [Peach] => 0
        )

    [Watermelon] => Array
        (
            [Pineaple] => 0
            [Strawberry] => 0
            [Watermelon] => 0
            [Peach] => 3
        )
)

Answer 1

它有点像 foreach 循环的噩梦，但这有效

它遍历第一个数组并检查相关键是否存在于第二个数组中，如果存在则将数组 1 中的值添加到数组 2 中。

它不会在第二个数组中创建新的事件，但如果这是您想要做的，那么更改将很简单。

$one = [
        ['Apple' => ['Pineaple' => 4, 'Strawberry'=>1]],
        ['Watermelon' => ['Peach' => 3]]
];
#print_r($one);
$two = [
        'Apple' => ['Pineaple' => 0, 'Strawberry' => 0, 'Watermelon' => 0, 'Peach' => 0],
        'Watermelon' => ['Pineaple' => 0, 'Strawberry' => 0, 'Watermelon' => 0, 'Peach' => 0]
];
#print_r($two);

foreach($one as $o) {
    foreach($o as $key => $row) {
        // check we have a key in array 2
        if ( isset( $two[$key]) ) {
            foreach( $row as $fruit => $val ){
                // check we have that key in the sub array
                if ( isset( $two[$key][$fruit]) ) {
                    $two[$key][$fruit] = $two[$key][$fruit] + $val;
                }
            }
        }
    }
}
print_r($two);

结果

Array
(
    [Apple] => Array
        (
            [Pineaple] => 4
            [Strawberry] => 1
            [Watermelon] => 0
            [Peach] => 0
        )

    [Watermelon] => Array
        (
            [Pineaple] => 0
            [Strawberry] => 0
            [Watermelon] => 0
            [Peach] => 3
        )
)