如何平坦数组和保存键?

Question

我有这个简单的数组:

[
'key1' => 'value',
'key2' => 'value',
'key3' => [
'u-key1' => 'value',
'u-key2' => 'value'
]
]

我想把它平展成这样:

[
'key1' => 'value',
'key2' => 'value',
'u-key1' => 'value',
'u-key2' => 'value'
]

我确信在Laravel中有一种简单的方法可以使用Collection/Arr helper来完成它，但不能弄清楚。

Answer 1

试试这个

$data = [
'key1' => 'value',
'key2' => 'value',
'key3' => [
'u-key1' => 'value',
'u-key2' => 'value'
]
];
$array = new RecursiveIteratorIterator(new RecursiveArrayIterator($data));
foreach ($array as $key => $value) {
$result[$key] = $value;
}
print_r($result);

输出:

Array
(
[key1] => value
[key2] => value
[u-key1] => value
[u-key2] => value
)

你的问题的答案演示下面

https://paiza.io/projects/F7G_b_S_skT916OeBrl2xw

Answer 2

试试这个:你的数组:

$arr= [
'key1' => 'value',
'key2' => 'value',
'key3' => [
'u-key1' => 'value',
'u-key2' => 'value'
]
]

你的功能:

$data = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr));
foreach($data as $index=> $d) {
$r[$index]=$d;
}
print_r($r);

更多信息请访问https://www.php.net/manual/en/function.array-column.php