在PHP中替换多维数组中的内键

function replaceKeys($array, $oldKey, $newKey) {
    foreach ($array as $key => $value) {
        if ($key === $oldKey) {
            $array[$newKey] = $value;
            unset($array[$oldKey]);
        } elseif (is_array($value)) {
            $array[$key] = replaceKeys($value, $oldKey, $newKey);
        }
    }
    
    return $array;
}

$array = [
    "key1" => "value1",
    "key2" => [
        "innerKey1" => "innerValue1",
        "innerKey2" => [
            "innerInnerKey1" => "innerInnerValue1"
        ]
    ]
];

$oldKey = "innerKey1";
$newKey = "newInnerKey1";

$result = replaceKeys($array, $oldKey, $newKey);
print_r($result);

Array
(
    [key1] => value1
    [key2] => Array
        (
            [newInnerKey1] => innerValue1
            [innerKey2] => Array
                (
                    [innerInnerKey1] => innerInnerValue1
                )
        )
)