Install specific Drupal version with composer
composer create-project drupal-composer/drupal-project:8.x-dev some-dir --stability dev --no-interaction --no-install
cd some-dir
composer require --no-update drupal/core:^8.5
composer require --no-update --dev webflo/drupal-core-require-dev:^8.5
composer install [--no-dev]Get current URI
$current_uri = Drupal::request()->getRequestUri();Get request parameter
//http://example.com?reset=1
$reset = \Drupal::request()->get('reset');Get current page node
$current_node = \Drupal::routeMatch()->getParameter('node');Private temp store
if (\Drupal::currentUser()->isAnonymous()) {
// Forces Drupal::service('user.private_tempstore') to work for anonymous user
$_SESSION['forced'] = TRUE;
}
$tempstore = Drupal::service('user.private_tempstore')->get('store_name');
$temp_menu = $tempstore->get('stored_item_name');
$tempstore->delete('our_expertise_menu');
$tempstore->set('stored_item_name', ['foo', 'bar']);Get paragraph field value
$node->field_presenter->first()->entity->field_persons_name->value;Count node paragraphs in twig template
{{ node.field_paragraphs.getvalue | length }}Get link field information
{{ entity['#entity'].field_link.get(0).title }}
{{ entity['#entity'].field_link.get(0).uri }}
{{ entity['#entity'].field_link.get(0).options }}
{{ link(entity['#entity'].field_link.get(0).title, entity['#entity'].field_link.get(0).uri, entity['#entity'].field_link.get(0).options) }}Twig helper functions can be found here https://www.drupal.org/docs/8/theming/twig/functions-in-twig-templates
Nice article about how to create a field type with multiple fields https://ixis.co.uk/blog/drupal-8-creating-field-types-multiple-values