AccessResult types in drupal 8 & 9

AccessResult types in drupal 8 & 9

Drupal is using  AccessResult objects for access checking. Here is a list of all the access results available.

• neutral
• allowed
• forbidden
• allowedIf
• forbiddenIf
• allowedIfHasPermission
• allowedIfHasPermissions
• isAllowed
• isForbidden
• isNeutral
• orIf
• andIf

This way, we can secure access to entities:

 /**
  * {@inheritdoc}
  */
 protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account)
 {
     if ($operation === 'view') {
         return AccessResult::allowedIfHasPermission($account, 'access content');
     }
     return parent::checkAccess($entity, $operation, $account);
 }