/**
 * Implements hook_filter_info_alter().
 */
function {{ machine_name }}_filter_info_alter(&$info) {
  // Replace the PHP evaluator process callback with an improved
  // PHP evaluator provided by a module.
  $info['php_code']['process callback'] = 'my_module_php_evaluator';

  // Alter the default settings of the URL filter provided by core.
  $info['filter_url']['default settings'] = array(
    'filter_url_length' => 100,
  );
}