Nested array, replace alphabetical keys with numeric and keep structure - php

Question

I have a nested array who is 4 levels deep.
I would like to replace the keys by numerical ones but not the meta level, this array should keep the alphabetical keys.
The array will have a lot of values and there will be more accounts like Marco Mueller, this is just a short example. It is important that it will keep the same nested structure, after its replaced by numerical keys.
$array = array (
'Marco Mueller' =>
array (
'meta' =>
array (
'accountName' => 'Marco Mueller',
'accountId' => '1',
'sum' => '3,659.06',
),
'Conrad, Ute' =>
array (
'meta' =>
array (
'customerName' => 'Conrad, Ute',
'customerId' => '8391',
'sum' => '457.59',
),
'Fidor Bank' =>
array (
'meta' =>
array (
'bankName' => 'Fidor Bank',
'bankKey' => 'FID',
'sum' => '457.59',
),
'H1-2019' =>
array (
'meta' =>
array (
'periodName' => 'H1-2019',
'periodId' => '5',
'sum' => '457.59',
),
),
),
),
),
);
The result should be
$array = array (
array (
'meta' =>
array (
'accountName' => 'Marco Mueller',
'accountId' => '1',
'sum' => '3,659.06',
),
'items' => array (
'meta' =>
array (
'customerName' => 'Conrad, Ute',
'customerId' => '8391',
'sum' => '457.59',
),
'items' =>
array (
'meta' =>
array (
'bankName' => 'Fidor Bank',
'bankKey' => 'FID',
'sum' => '457.59',
),
'items' => array (
'meta' =>
array (
'periodName' => 'H1-2019',
'periodId' => '5',
'sum' => '457.59',
),
),
),
array (
'meta' =>
array (
'periodName' => 'H2-2019',
'periodId' => '6',
'sum' => '600',
),
),
),
),
),
);

Answer 1

I solved my problem with this function, if anyone has an idea how to make this more elegant and efficient, your welcome!
private function getValues(array $array)
{
$newArray = [];
foreach ($array as $item) {
$meta = $item['meta'];
unset($item['meta']);
$arrayValues = array_values($item);
if (count($arrayValues) > 1 || count($arrayValues[0]) > 1) {
$arrayValues = $this->getValues($arrayValues);
}
if (!$arrayValues) {
$values = [
'meta' => $meta,
];
} else {
$values = [
'meta' => $meta,
'items' => $arrayValues,
];
}
$newArray[] = $values;
}
return $newArray;
}