I have code in route.php
Route::get('website/{post}/{comment}', ['uses'=>'MainController@add']);
public function add(Requests $request){
$data = $request->all();
echo $data['post'];
echo $data['comment'];
}
See the documentation on controllers.
Your controller code should look like this:
public function add($post, $comment){
echo $post;
echo $comment;
}