如何在yii2 urlmanager中为默认页面创建干净的url

defaultRoute 默认 $page

'rules' => [
    [
        'pattern' => '',
        'route' => 'site/index',
        'defaults' => ['page' => 1],
    ],
    [
        'pattern' => 'page/<page:\d+>',
        'route' => 'site/index',
    ],
],

public function actionIndex($page)
{
    echo '<pre>';
    echo 'site / index / $page ' . print_r($page, true);
    echo '</pre>';
    exit;
}

public function actionIndex($page = 1)
{
    echo '<pre>';
    echo 'site / index / $page ' . print_r($page, true);
    echo '</pre>';
    exit;
}

'rules' => [
    [
        'pattern' => '',
        'route' => 'site/index',
    ],
    [
        'pattern' => 'page/<page:\d+>',
        'route' => 'site/index',
    ],
],