function hook_tokens_alter in Drupal 8

Same name and namespace in other branches

1. 7 modules/system/system.api.php \hook_tokens_alter()
2. 9 core/lib/Drupal/Core/Utility/token.api.php \hook_tokens_alter()

Alter replacement values for placeholder tokens.

Parameters

$replacements: An associative array of replacements returned by hook_tokens().

$context: The context in which hook_tokens() was called. An associative array with the following keys, which have the same meaning as the corresponding parameters of hook_tokens():

• 'type'
• 'tokens'
• 'data'
• 'options'

\Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata: The bubbleable metadata. In case you alter an existing token based upon a data source that isn't in $context['data'], you must add that dependency to $bubbleable_metadata.

See also

hook_tokens()

Related topics

1 invocation of hook_tokens_alter()

Token::generate in core/lib/Drupal/Core/Utility/Token.php

Generates replacement values for a list of tokens.

File

core/lib/Drupal/Core/Utility/token.api.php, line 151

Hooks related to the Token system.

Code

function hook_tokens_alter(array &$replacements, array $context, \Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata) {
  $options = $context['options'];
  if (isset($options['langcode'])) {
    $url_options['language'] = \Drupal::languageManager()
      ->getLanguage($options['langcode']);
    $langcode = $options['langcode'];
  }
  else {
    $langcode = NULL;
  }
  if ($context['type'] == 'node' && !empty($context['data']['node'])) {
    $node = $context['data']['node'];

    // Alter the [node:title] token, and replace it with the rendered content
    // of a field (field_title).
    if (isset($context['tokens']['title'])) {
      $title = $node->field_title
        ->view('default');
      $replacements[$context['tokens']['title']] = \Drupal::service('renderer')
        ->render($title);
    }
  }
}