Request parameters, route name, and route object should be accessed via RouteMatch

For all Drupal 8 code going forward, if you need access to the request parameters, the route name, or the route object itself, use RouteMatch.

• If you have a request available, you can just RouteMatch::createFromRequest($request).
• Without a request, you should inject the 'current_route_match' service.
• In procedural code, you can use \Drupal::routeMatch().

For example:

D7

if ($node = menu_get_object('node', 1)) {
}

D8

if ($node = \Drupal::routeMatch()->getParameter('node')) {
}

For Drupal 7 to Drupal 8 conversion information related to routing and route parameters, see the following other change records:

• Removed menu_get_item() and menu_set_item()
• arg() is deprecated and will be removed