PHP数组日期与数值如何高效合并？

$arr = array(
    'categories' => array(
        '22-01-30', '22-01-31', '22-02-01', '22-02-02', '22-02-03', '22-02-04',
        '22-02-05', '22-02-06', '22-02-07', '22-02-08', '22-02-09', '22-02-10',
        '22-02-11', '22-02-12', '22-02-13', '22-02-14', '22-02-15', '22-02-16',
        '22-02-17', '22-02-18', '22-02-19', '22-02-20', '22-02-21', '22-02-22',
        '22-02-23', '22-02-24', '22-02-25', '22-02-26', '22-02-27', '22-02-28'
    ),
    'data' => array(
        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5638.04, 0.00, 0.00, 0.00, 0.00, 0.00,
        0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 25915.99, 1606.44,
        1676.90, 0.00, 0.00, 1203.08
    )
);

$groupSize = 6;
$newCategories = [];
$newData = [];
$categories = $arr['categories'];
$data = $arr['data'];
$count = count($categories);

for ($i = 0; $i < $count; $i += $groupSize) {
    $newCategories[] = implode(', ', array_slice($categories, $i, $groupSize));
    $newData[] = array_sum(array_slice($data, $i, $groupSize));
}

$result = array(
    'categories' => $newCategories,
    'data' => $newData
);

print_r($result);