将带有键的数组转换为其他格式的最简单方法是什么

Question

I have the following array:

Array
(
    [key1] => 10
    [key2] => 7
    [key3] => 8
)

I want to convert it to the following structure:

Array
(
    [0] => Array
        (
            [section] => key1
            [quantity] => 10
        ),
    [1] => Array
        (
            [section] => key2
            [quantity] => 7
        ),
    [2] => Array
        (
            [section] => key3
            [quantity] => 8
        )
)

I tried to use array_map function, but inside the closure I get only a value without a key. Please, suggest me the easiest way to do it, without foreach.

Update
I think using foreach requires creation of an additional variable which makes the code messy and resource requiring.

Answer 1

Try using array_walk as

$result = array();
array_walk($arr, function ($v,$k) use(&$result) {
     $result[] = array('section' => $k, 'quantity' => $v);
});

demo using array_walk

Using foreach

$result = array();
foreach($arr as $key => $value){
    $result[] = array('section' => $key, 'quantity' => $value);
}

print_r($result);

demo using foreach