I had a case where an extra tab was necessary on the user pages. This snippets show you how to do it.

Sometimes it is needed for a user to be redirected after registration. The user is not logged in yet, and has to go to a landing page with more instructions on verifying his e-mail.

By default drupal will take 600 characters to show your description. But you need to know that this setting is used to show in the metatags as well.

foreach (\Drupal::routeMatch()->getParameters() as $entity) {
  if ($entity instanceof \Drupal\Core\Entity\EntityInterface) {
    // here $entity is your object
  }
}

 

The forum module is a core module that was rewritten for drupal 8. In this snippet I show you how to create forum topics programmatically.