A purl implementation for Drupal.

zppurl.module

<?php

/**
 * Implements hook_purl_provider().
 */
function zppurl_purl_provider() {
  return array(
    'zp_meisterschaft' => array(
      'name' => t('Meisterschaft provider'),
      'description' => t('Retrieves ID for the current meisterschaft.'),
      'callback' => 'drupal_set_message',
      'example' => 'foobar',
    ),
  );
}

/**
 * Implements hook_purl_modifiers().
 */
function zppurl_purl_modifiers() {

  // Load possible
  $options = array(
    'title_field' => 'name',
    'ids' => array(),
    'string' => '',
    'match' => '',
  );
  $ids = references_potential_references_view('taxonomy_term', 'zppurl_helper', 'references_1', array(), $options);
  $modifiers = array();
  foreach ($ids as $id => $spec) {
    $key = strip_tags($spec['rendered']);
    if (!empty($key)) {
      $modifiers[] = array('value' => $key, 'id' => $id);
    }
  }
  return array(
    'zp_meisterschaft' => $modifiers,
  );
}