Drupal 8 add message

 \Drupal::messenger()->addMessage($message, 'status');
 \Drupal::messenger()->addMessage($message, 'warning');
 \Drupal::messenger()->addMessage($message, 'error');

Source: api.drupal.org

Drupal set message

$messenger = \Drupal::messenger();
$messenger->addMessage('STUFF', $messenger::TYPE_WARNING);

Source: api.drupal.org

Similar codes

0 vote297 views1 answer
Drupal 8 $_GET
PHP Drupal
0 vote295 views1 answer
Get node id in twig drupal
PHP Drupal
0 vote298 views1 answer
Drupal 9 entity.repository load entity by UUID
PHP Drupal
0 vote292 views1 answer
Drupal 9 how to pass arguments to custom blocks
PHP Drupal
0 vote294 views1 answer
Drupal 9 Get taxonomy term objects by vocabulary machine name vid
PHP Drupal
1 vote299 views1 answer
Routing code in drupal 8
PHP Drupal
0 vote300 views1 answer
Drupal 8 entity query
PHP Drupal
0 vote313 views1 answer
Drupal 9 check if UUD is valid
PHP Drupal
1 vote321 views1 answer
Drupal 9 enable PHP errors
PHP Drupal
0 vote299 views1 answer
Drupal 8 entity_view
PHP Drupal