如何在laravel 5.2中遍历多维数组

function traverseArray($array) {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            traverseArray($value);
        } else {
            // 处理数组元素
            echo "Key: " . $key . ", Value: " . $value . "<br>";
        }
    }
}

// 调用方法
$array = [
    'key1' => 'value1',
    'key2' => [
        'subkey1' => 'subvalue1',
        'subkey2' => 'subvalue2',
    ],
    'key3' => 'value3',
];

traverseArray($array);

use Illuminate\Support\Collection;

$array = [
    'key1' => 'value1',
    'key2' => [
        'subkey1' => 'subvalue1',
        'subkey2' => 'subvalue2',
    ],
    'key3' => 'value3',
];

$collection = collect($array);

$collection->recursive();

$collection->each(function ($item, $key) {
    // 处理数组元素
    echo "Key: " . $key . ", Value: " . $item . "<br>";
});