Drupal 8에서 모듈에 대한 도움말 페이지 만들기

drush generate module

<?php

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function tester_helper_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.tester_helper':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('The module is example:') . '</p';
      $output .= '<ul>';
      $output .= '<li>' . t('To show simple hook template') . '</li>';
      $output .= '<li>' . t('To show how the page looks like') . '</li>';
      $output .= '<li>' . t('To show it is very easy to create help page for module') . '</li>';
      $output .= '</ul>';
      return $output;

    default:
  }
}