Question

我有一个这样的数组：

$array1 = [
  ['State'=>'Utah', 'users'=>5],
  ['State'=>'California', 'users'=>10]
]

$array2 = [
  ['State'=>'Utah', 'emails'=>18],
  ['State'=>'Arizona', 'emails'=>32],
  ['State'=>'California', 'emails'=>28],
]

我如何合并它们以便它会变成这样：

$mergedArray = [
  ['State'=>'Utah', 'users'=>5, 'emails'=>18],
  ['State'=>'Arizona', 'emails'=>32],
  ['State'=>'California', 'users'=>10, 'emails'=>28]
]

我尝试了array_merge，但它只保留了第一个数组的数据。

编辑：注意数组的长度和顺序如何不同。

Answer 1

使用array_replace_recursive功能：

$array1 = ['Utah'=>['users'=>5],'California'=>['users'=>10]];
$array2 = ['Utah'=>['emails'=>18],'California'=>['emails'=>28]];

$result = array_replace_recursive($array1, $array2);

print_r($result);

输出：

Array
(
    [Utah] => Array
        (
            [users] => 5
            [emails] => 18
        )

    [California] => Array
        (
            [users] => 10
            [emails] => 28
        )
)

<强>更新
虽然您已更改了初始要求，但我也为新输入数据提供了解决方案。
使用过的功能：array_merge和array_values < / p>

// user data
$array1 = [
  ['State'=>'Utah', 'users'=>5],
  ['State'=>'California', 'users'=>10]
];

// email data
$array2 = [
  ['State'=>'Utah', 'emails'=>18],
  ['State'=>'Arizona', 'emails'=>32],
  ['State'=>'California', 'emails'=>28],
];

$result = [];
foreach (array_merge($array1, $array2) as $item) {
    if (isset($result[$item['State']])) {
        $result[$item['State']] = array_merge($result[$item['State']], $item);
    } else {
        $result[$item['State']] = $item;
    }
}
$result = array_values($result);

print_r($result);

输出：

Array
(
    [0] => Array
        (
            [State] => Utah
            [users] => 5
            [emails] => 18
        )

    [1] => Array
        (
            [State] => California
            [users] => 10
            [emails] => 28
        )

    [2] => Array
        (
            [State] => Arizona
            [emails] => 32
        )
)

PHP合并具有重复键的关联数组

1 个答案: