Redirect after form submission

Question

I create custom Form in Drupal 8 ,I remember we can redirect to custom path in Drupal 7 with set $form_state['redirect'] = 'mycustompath'; in custom submit handler, but how can redirect User after Form submission in Drupal 8?

I know I should use submitForm method:

public function submitForm(array &$form, FormStateInterface $form_state)
{
   //submissions jobs ...
   //redirect path
}

Answer 1

In your "submitForm" method write below code

 $form_state->setRedirect('machine_name');
 return;

where machine_name is the machine name mentioned in the routing file.

I hope this helps .. :)

Answer 2

If you want to set at buildform you need to use some routing path like.

use Drupal\Core\Url;

$url = Url::fromRoute('route.path');
$form_state->setRedirectUrl($url);

Answer 3

If you want to redirect user edit form to the home page or other page follow below code.

First, add-hook - hook_form_alter`

function yourmodulename_form_alter(&$form, FormStateInterface $form_state, $form_id) 
{
    if ($form_id === 'your form id') {
    $form['actions']['submit']['#submit'][] = 'modulename_user_edit_form_submit';
  } 
}

after adding hook add below function

function modulename_user_edit_form_submit($form,  FormStateInterface &$form_state) {
  global $base_url; //set base path
  $response = new Symfony\Component\HttpFoundation\RedirectResponse($base_url ."/xyz"); //set url
  $response->send();
  return;
}

I hope this help.