在多维Laravel对象中显示键和值

$data = [
    'name' => 'John',
    'age' => 30,
    'address' => [
        'street' => '123 Main St',
        'city' => 'New York',
        'country' => 'USA'
    ]
];

dd($data);

array:3 [
  "name" => "John"
  "age" => 30
  "address" => array:3 [
    "street" => "123 Main St"
    "city" => "New York"
    "country" => "USA"
  ]
]

$data = [
    'name' => 'John',
    'age' => 30,
    'address' => [
        'street' => '123 Main St',
        'city' => 'New York',
        'country' => 'USA'
    ]
];

foreach ($data as $key => $value) {
    if (is_array($value) || is_object($value)) {
        echo "$key:\n";
        foreach ($value as $subKey => $subValue) {
            echo "  $subKey: $subValue\n";
        }
    } else {
        echo "$key: $value\n";
    }
}

name: John
age: 30
address:
  street: 123 Main St
  city: New York
  country: USA