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diff --git a/web/core/modules/help/src/Controller/HelpController.php b/web/core/modules/help/src/Controller/HelpController.php
new file mode 100644
index 000000000..74d46ecb0
--- /dev/null
+++ b/web/core/modules/help/src/Controller/HelpController.php
@@ -0,0 +1,162 @@
+<?php
+
+namespace Drupal\help\Controller;
+
+use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\help\HelpSectionManager;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+/**
+ * Controller routines for help routes.
+ */
+class HelpController extends ControllerBase {
+
+  /**
+   * The current route match.
+   *
+   * @var \Drupal\Core\Routing\RouteMatchInterface
+   */
+  protected $routeMatch;
+
+  /**
+   * The help section plugin manager.
+   *
+   * @var \Drupal\help\HelpSectionManager
+   */
+  protected $helpManager;
+
+  /**
+   * Creates a new HelpController.
+   *
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The current route match.
+   * @param \Drupal\help\HelpSectionManager $help_manager
+   *   The help section manager.
+   */
+  public function __construct(RouteMatchInterface $route_match, HelpSectionManager $help_manager) {
+    $this->routeMatch = $route_match;
+    $this->helpManager = $help_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('current_route_match'),
+      $container->get('plugin.manager.help_section')
+    );
+  }
+
+  /**
+   * Prints a page listing various types of help.
+   *
+   * The page has sections defined by \Drupal\help\HelpSectionPluginInterface
+   * plugins.
+   *
+   * @return array
+   *   A render array for the help page.
+   */
+  public function helpMain() {
+    $output = [];
+
+    // We are checking permissions, so add the user.permissions cache context.
+    $cacheability = new CacheableMetadata();
+    $cacheability->addCacheContexts(['user.permissions']);
+
+    $plugins = $this->helpManager->getDefinitions();
+    $cacheability->addCacheableDependency($this->helpManager);
+
+    foreach ($plugins as $plugin_id => $plugin_definition) {
+      // Check the provided permission.
+      if (!empty($plugin_definition['permission']) && !$this->currentuser()->hasPermission($plugin_definition['permission'])) {
+        continue;
+      }
+
+      // Add the section to the page.
+      /** @var \Drupal\help\HelpSectionPluginInterface $plugin */
+      $plugin = $this->helpManager->createInstance($plugin_id);
+      $this_output = [
+        '#theme' => 'help_section',
+        '#title' => $plugin->getTitle(),
+        '#description' => $plugin->getDescription(),
+        '#empty' => $this->t('There is currently nothing in this section.'),
+        '#links' => [],
+      ];
+
+      $links = $plugin->listTopics();
+      if (is_array($links) && count($links)) {
+        $this_output['#links'] = $links;
+      }
+
+      $cacheability->addCacheableDependency($plugin);
+      $output[$plugin_id] = $this_output;
+    }
+
+    $cacheability->applyTo($output);
+    return $output;
+  }
+
+  /**
+   * Prints a page listing general help for a module.
+   *
+   * @param string $name
+   *   A module name to display a help page for.
+   *
+   * @return array
+   *   A render array as expected by drupal_render().
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
+   */
+  public function helpPage($name) {
+    $build = [];
+    if ($this->moduleHandler()->implementsHook($name, 'help')) {
+      $module_name = $this->moduleHandler()->getName($name);
+      $build['#title'] = $module_name;
+
+      $info = system_get_info('module', $name);
+      if ($info['package'] === 'Core (Experimental)') {
+        drupal_set_message($this->t('This module is experimental. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', [':url' => 'https://www.drupal.org/core/experimental']), 'warning');
+      }
+
+      $temp = $this->moduleHandler()->invoke($name, 'help', ["help.page.$name", $this->routeMatch]);
+      if (empty($temp)) {
+        $build['top'] = ['#markup' => $this->t('No help is available for module %module.', ['%module' => $module_name])];
+      }
+      else {
+        if (!is_array($temp)) {
+          $temp = ['#markup' => $temp];
+        }
+        $build['top'] = $temp;
+      }
+
+      // Only print list of administration pages if the module in question has
+      // any such pages associated with it.
+      $admin_tasks = system_get_module_admin_tasks($name, system_get_info('module', $name));
+      if (!empty($admin_tasks)) {
+        $links = [];
+        foreach ($admin_tasks as $task) {
+          $link['url'] = $task['url'];
+          $link['title'] = $task['title'];
+          $links[] = $link;
+        }
+        $build['links'] = [
+          '#theme' => 'links__help',
+          '#heading' => [
+            'level' => 'h3',
+            'text' => $this->t('@module administration pages', ['@module' => $module_name]),
+          ],
+          '#links' => $links,
+        ];
+      }
+      return $build;
+    }
+    else {
+      throw new NotFoundHttpException();
+    }
+  }
+
+}