如何在PHP中改变数组的格式？

$array = ['apple', 'banana', 'orange'];
$newArray = array_map('strtoupper', $array);
print_r($newArray);

Array
(
    [0] => APPLE
    [1] => BANANA
    [2] => ORANGE
)

$array = ['apple', 'banana', 'orange'];
$newArray = [];
foreach ($array as $key => $value) {
    $newArray[$key + 1] = $value;
}
print_r($newArray);

Array
(
    [1] => apple
    [2] => banana
    [3] => orange
)

$array = ['apple', 'banana', 'orange'];
$newArray = array_reduce($array, function ($carry, $item) {
    return $carry . ' ' . $item;
});
echo $newArray;

apple banana orange

$array = [
    ['id' => 1, 'name' => 'apple'],
    ['id' => 2, 'name' => 'banana'],
    ['id' => 3, 'name' => 'orange']
];
$newArray = array_column($array, 'name');
print_r($newArray);

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)