function hook_tokens

Provide replacement values for placeholder tokens.

This hook is invoked when someone calls token_replace(). That function first scans the text for [type:token] patterns, and splits the needed tokens into groups by type. Then hook_tokens() is invoked on each token-type group, allowing your module to respond by providing replacement text for any of the tokens in the group that your module knows how to process.

A module implementing this hook should also implement hook_token_info() in order to list its available tokens on editing screens.

Parameters

$type: The machine-readable name of the type (group) of token being replaced, such as 'node', 'user', or another type defined by a hook_token_info() implementation.

$tokens: An array of tokens to be replaced. The keys are the machine-readable token names, and the values are the raw [type:token] strings that appeared in the original text.

$data: (optional) An associative array of data objects to be used when generating replacement values, as supplied in the $data parameter to token_replace().

$options: (optional) An associative array of options for token replacement; see token_replace() for possible values.

Return value

An associative array of replacement values, keyed by the raw [type:token]: strings from the original text.

See also

hook_token_info()

hook_tokens_alter()

Related topics

File

core/modules/system/system.api.php, line 3759

Hooks provided by Backdrop core and the System module.

Code

function hook_tokens($type, $tokens, array $data = array(), array $options = array()) {
  $url_options = array('absolute' => TRUE);
  if (isset($options['language'])) {
    $url_options['language'] = $options['language'];
    $language_code = $options['language']->langcode;
  }
  else {
    $language_code = NULL;
  }
  $sanitize = !empty($options['sanitize']);

  $replacements = array();

  if ($type == 'node' && !empty($data['node'])) {
    $node = $data['node'];

    foreach ($tokens as $name => $original) {
      switch ($name) {
        // Simple key values on the node.
        case 'nid':
          $replacements[$original] = $node->nid;
          break;

        case 'title':
          $replacements[$original] = $sanitize ? check_plain($node->title) : $node->title;
          break;

        case 'edit-url':
          $replacements[$original] = url('node/' . $node->nid . '/edit', $url_options);
          break;

          // Default values for the chained tokens handled below.
        case 'author':
          $name = ($node->uid == 0) ? config_get_translated('system.core', 'anonymous') : $node->name;
          $replacements[$original] = $sanitize ? filter_xss($name) : $name;
          break;

        case 'created':
          $replacements[$original] = format_date($node->created, 'medium', '', NULL, $language_code);
          break;
      }
    }

    if ($author_tokens = token_find_with_prefix($tokens, 'author')) {
      $author = user_load($node->uid);
      $replacements += token_generate('user', $author_tokens, array('user' => $author), $options);
    }

    if ($created_tokens = token_find_with_prefix($tokens, 'created')) {
      $replacements += token_generate('date', $created_tokens, array('date' => $node->created), $options);
    }
  }

  return $replacements;
}