drupal 8 custom redirect after user registration
/*
* Allow redirect upon register
*/
function MYMODULE_form_user_register_form_alter(&$form, &$form_state, $form_id) {
foreach (array_keys($form['actions']) as $action) {
if ($action != 'preview' && isset($form['actions'][$action]['#type']) && $form['actions'][$action]['#type'] === 'submit') {
$form['actions'][$action]['#submit'][] = 'MYMODULE_redirect_new_registered_users';
}
}
}
/*
* Redirection
*/
function MYMODULE_redirect_new_registered_users($form, FormStateInterface &$form_state) {
$form_state->setRedirect('entity.node.canonical', ['node' => 'LANDING_PAGE_NID']);
}