>[danger] 限定参数类型 ``` Route::get('article/{id?}', function($id = 123){ return '当前文章的id' . $id; })->where(['id' => '\d+']); ``` >[danger] 路由别名 ``` Route::get('article/{id?}', function($id = 123){ return '当前文章的id' . $id; })->where(['id' => '\d+'])->name('index.art'); Route::get('test', function(){ return route('index.art'); }); ```