hook_link

Define internal Drupal links.

This hook enables modules to add links to many parts of Drupal. Links may be added in nodes or in the navigation block, for example.

The returned array should be a keyed array of link entries. Each link can be in one of two formats.

The first format will use the l() function to render the link:

• href: Required. The URL of the link.
• title: Required. The name of the link.
• attributes: Optional. See l() for usage.
• html: Optional. See l() for usage.
• query: Optional. See l() for usage.
• fragment: Optional. See l() for usage.

The second format can be used for non-links. Leaving out the href index will select this format:

• title: Required. The text or HTML code to display.
• attributes: Optional. An associative array of HTML attributes to apply to the span tag.
• html: Optional. If not set to true, check_plain() will be run on the title before it is displayed.

Parameters

$type: An identifier declaring what kind of link is being requested. Possible values:

• node: Links to be placed below a node being viewed.
• comment: Links to be placed below a comment being viewed.

$node: A node object passed in case of node links.

$teaser: In case of node link: a 0/1 flag depending on whether the node is displayed with its teaser or its full form (on a node/nid page)

Return value

An array of the requested links.

Related topics

Hooks

Allow modules to interact with the Drupal core.

File

developer/hooks/core.php, line 594

These are the hooks that are invoked by the Drupal core.

Code

<?php
function hook_link($type, $node = NULL, $teaser = FALSE) {
  $links = array();

  if ($type == 'node' && isset($node->parent)) {
    if (!$teaser) {
      if (book_access('create', $node)) {
        $links['book_add_child'] = array(
          'title' => t('add child page'), 
          'href' => "node/add/book/parent/$node->nid",
        );
      }
      if (user_access('see printer-friendly version')) {
        $links['book_printer'] = array(
          'title' => t('printer-friendly version'), 
          'href' => 'book/export/html/' . $node->nid, 
          'attributes' => array('title' => t('Show a printer-friendly version of this book page and its sub-pages.')),
        );
      }
    }
  }

  $links['sample_link'] = array(
    'title' => t('go somewhere'), 
    'href' => 'node/add', 
    'query' => 'foo=bar', 
    'fragment' => 'anchorname', 
    'attributes' => array('title' => t('go to another page')),
  );

  // Example of a link that's not an anchor
  if ($type == 'video') {
    if (variable_get('video_playcounter', 1) && user_access('view play counter')) {
      $links['play_counter'] = array(
        'title' => format_plural($node->play_counter, '1 play', '@count plays'),
      );
    }
  }

  return $links;
}
?>