public function CacheExampleForm::createExpiringItem in Examples for Developers 8

Same name and namespace in other branches

1. 3.x modules/cache_example/src/Form/CacheExampleForm.php \Drupal\cache_example\Form\CacheExampleForm::createExpiringItem()

Submit handler to create a new cache item with specified expiration.

File

cache_example/src/Form/CacheExampleForm.php, line 235

Class

CacheExampleForm

Form with examples on how to use cache.

Namespace

Drupal\cache_example\Form

Code

public function createExpiringItem($form, &$form_state) {
  $tags = [
    'cache_example:1',
  ];
  $interval = $form_state
    ->getValue('expiration');
  if ($interval == 'never_remove') {
    $expiration = CacheBackendInterface::CACHE_PERMANENT;
    $expiration_friendly = $this
      ->t('Never expires');
  }
  else {
    $expiration = time() + $interval;
    $expiration_friendly = $this->dateFormatter
      ->format($expiration);
  }

  // Set the expiration to the actual Unix timestamp of the end of the
  // required interval. Also add a tag to it to be able to clear caches more
  // precise.
  $this->cacheBackend
    ->set('cache_example_expiring_item', $expiration_friendly, $expiration, $tags);
  $this
    ->messenger()
    ->addMessage($this
    ->t('cache_example_expiring_item was set to expire at %time', [
    '%time' => $expiration_friendly,
  ]));
}