$data['vocabulary']

Dear Sirs,
i have found difficulty in adding a custom token type for the 'Vocabularies' kind.

Task:

Invoke all the tags for a desired vocabulary.

Issue:

By choosing

<option value="vocabulary">Vocabularies [needs: vocabulary]</option>, it demands $data['vocabulary'] be declared.

Do not understand how to code it correctly.

Proposed resolution:

By means of the "custom" (token type), correct snippet would be:

<?php
 $result = "";
 $vocabulary= taxonomy_vocabulary_machine_name_load('tags');
 if ($terms = taxonomy_get_tree($vocabulary->vid)) {

   foreach ($terms as $term) {

     $taxonomy[] = $term->name;
     $result = implode(',',$taxonomy) ;

    }
return $result;

}
?>

Anyway, i wish i would understand how to declare through the Vocabularies option.