php array_map多维数组

<?php
function square($num) {
    return $num * $num;
}

$array = [1, 2, 3, 4, 5];
$squaredArray = array_map('square', $array);

print_r($squaredArray);
// 输出: Array ( [0] => 1 [1] => 4 [2] => 9 [3] => 16 [4] => 25 )
?>

<?php
function square($num) {
    return $num * $num;
}

function recursiveMap($array) {
    return array_map(function($value) {
        if (is_array($value)) {
            return recursiveMap($value);
        }
        return square($value);
    }, $array);
}

$array = [1, [2, 3], [4, [5, 6]]];
$squaredArray = recursiveMap($array);

print_r($squaredArray);
// 输出: Array ( [0] => 1 [1] => Array ( [0] => 4 [1] => 9 ) [2] => Array ( [0] => 16 [1] => Array ( [0] => 25 [1] => 36 ) ) )
?>

<?php
function recursiveMap($array) {
    return array_map(function($value) {
        if (is_array($value)) {
            return recursiveMap($value);
        }
        return square($value);
    }, $array);
}
?>