在php中将数组的数组转换为数组键值

<?php
function flattenArray($array, &$result = []) {
    foreach ($array as $value) {
        if (is_array($value)) {
            flattenArray($value, $result);
        } else {
            $result[] = $value;
        }
    }
    return $result;
}

// 示例二维数组
$multiArray = [
    ['a' => 1, 'b' => 2],
    ['c' => 3, 'd' => 4]
];

// 转换为一维数组
$flattenedArray = flattenArray($multiArray);

print_r($flattenedArray);
?>

<?php
function flattenArrayWithKeys($array, $prefix = '', &$result = []) {
    foreach ($array as $key => $value) {
        $newKey = $prefix ? $prefix . '.' . $key : $key;
        if (is_array($value)) {
            flattenArrayWithKeys($value, $newKey, $result);
        } else {
            $result[$newKey] = $value;
        }
    }
    return $result;
}

// 示例二维数组
$multiArray = [
    ['a' => 1, 'b' => 2],
    ['a' => 3, 'b' => 4]
];

// 转换为一维数组，并保留键名信息
$flattenedArrayWithKeys = flattenArrayWithKeys($multiArray);

print_r($flattenedArrayWithKeys);
?>