从包含关联数组的PHP数组生成详细信息/摘要树

$array = [
    'name' => 'John Doe',
    'age' => 30,
    'address' => [
        'street' => '123 Main St',
        'city' => 'Anytown',
        'zip' => '12345',
    ],
    'contacts' => [
        ['type' => 'email', 'value' => 'john@example.com'],
        ['type' => 'phone', 'value' => '555-1234'],
    ],
];

function generateTree($array, $prefix = '') {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            echo $prefix . $key . ":\n";
            generateTree($value, $prefix . '  ');
        } else {
            echo $prefix . $key . ': ' . $value . "\n";
        }
    }
}

generateTree($array);