link_help

link_help($route_name, RouteMatchInterface $route_match)

function link_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.link':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('The Link module allows you to create fields that contain internal or external URLs and optional link text. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":link_documentation">online documentation for the Link module</a>.', array(':field' => \Drupal::url('help.page', array('name' => 'field')), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#', ':link_documentation' => 'https://www.drupal.org/documentation/modules/link')) . '</p>';
      $output .= '<h3>' . t('Uses') . '</h3>';
      $output .= '<dl>';
      $output .= '<dt>' . t('Managing and displaying link fields') . '</dt>';
      $output .= '<dd>' . t('The <em>settings</em> and the <em>display</em> of the link field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', array(':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', array('name' => 'field_ui')) : '#')) . '</dd>';
      $output .= '<dt>' . t('Setting the allowed link type') . '</dt>';
      $output .= '<dd>' . t('In the field settings you can define the allowed link type to be <em>internal links only</em>, <em>external links only</em>, or <em>both internal and external links</em>. <em>Internal links only</em> and <em>both internal and external links</em> options enable an autocomplete widget for internal links, so a user does not have to copy or remember a URL.') . '</dd>';
      $output .= '<dt>' . t('Adding link text') . '</dt>';
      $output .= '<dd>' . t('In the field settings you can define additional link text to be <em>optional</em> or <em>required</em> in any link field.') . '</dd>';
      $output .= '<dt>' . t('Displaying link text') . '</dt>';
      $output .= '<dd>' . t('If link text has been submitted for a URL, then by default this link text is displayed as a link to the URL. If you want to display both the link text <em>and</em> the URL, choose the appropriate link format from the drop-down menu in the <em>Manage display</em> page. If you only want to display the URL even if link text has been submitted, choose <em>Link</em> as the format, and then change its <em>Format settings</em> to display <em>URL only</em>.') . '</dd>';
      $output .= '<dt>' . t('Adding attributes to links') . '</dt>';
      $output .= '<dd>' . t('You can add attributes to links, by changing the <em>Format settings</em> in the <em>Manage display</em> page. Adding <em>rel="nofollow"</em> notifies search engines that links should not be followed.') . '</dd>';
      $output .= '<dt>' . t('Validating URLs') . '</dt>';
      $output .= '<dd>' . t('All links are validated after a link field is filled in. They can include anchors or query strings.') . '</dd>';
      $output .= '</dl>';
      return $output;
  }
}