Plates

<button <?= attributes([
    'type' => $type ?? 'button',
    'class' => [
        'btn',
        'btn--large' => $size === 'large'
    ],
 ])->merge($attr ?? []) ?>>

$form = new Form([
    'name' => [
        'rules'   => ['required'],
        'message' => ['Name is required']
    ],
]);