function node_feed in Drupal 6

Same name and namespace in other branches

1. 4 modules/node.module \node_feed()
2. 5 modules/node/node.module \node_feed()
3. 7 modules/node/node.module \node_feed()

A generic function for generating RSS feeds from a set of nodes.

Parameters

$nids: An array of node IDs (nid). Defaults to FALSE so empty feeds can be generated with passing an empty array, if no items are to be added to the feed.

$channel: An associative array containing title, link, description and other keys. The link should be an absolute URL.

3 calls to node_feed()

blog_feed_last in modules/blog/blog.pages.inc

Menu callback; displays an RSS feed containing recent blog entries of all users.

blog_feed_user in modules/blog/blog.pages.inc

Menu callback; displays an RSS feed containing recent blog entries of a given user.

taxonomy_term_page in modules/taxonomy/taxonomy.pages.inc

Menu callback; displays all nodes associated with a term.

1 string reference to 'node_feed'

node_menu in modules/node/node.module

Implementation of hook_menu().

File

modules/node/node.module, line 1672

The core that allows content to be submitted to the site. Modules and scripts may programmatically submit nodes using the usual form API pattern.

Code

function node_feed($nids = FALSE, $channel = array()) {
  global $base_url, $language;
  if ($nids === FALSE) {
    $nids = array();
    $result = db_query_range(db_rewrite_sql('SELECT n.nid, n.created FROM {node} n WHERE n.promote = 1 AND n.status = 1 ORDER BY n.created DESC'), 0, variable_get('feed_default_items', 10));
    while ($row = db_fetch_object($result)) {
      $nids[] = $row->nid;
    }
  }
  $item_length = variable_get('feed_item_length', 'teaser');
  $namespaces = array(
    'xmlns:dc' => 'http://purl.org/dc/elements/1.1/',
  );
  $items = '';
  foreach ($nids as $nid) {

    // Load the specified node:
    $item = node_load($nid);
    $item->build_mode = NODE_BUILD_RSS;
    $item->link = url("node/{$nid}", array(
      'absolute' => TRUE,
    ));
    if ($item_length != 'title') {
      $teaser = $item_length == 'teaser' ? TRUE : FALSE;

      // Filter and prepare node teaser
      if (node_hook($item, 'view')) {
        $item = node_invoke($item, 'view', $teaser, FALSE);
      }
      else {
        $item = node_prepare($item, $teaser);
      }

      // Allow modules to change $node->content before the node is rendered.
      node_invoke_nodeapi($item, 'view', $teaser, FALSE);

      // Set the proper node property, then unset unused $node property so that a
      // bad theme can not open a security hole.
      $content = drupal_render($item->content);
      if ($teaser) {
        $item->teaser = $content;
        unset($item->body);
      }
      else {
        $item->body = $content;
        unset($item->teaser);
      }

      // Allow modules to modify the fully-built node.
      node_invoke_nodeapi($item, 'alter', $teaser, FALSE);
    }

    // Allow modules to add additional item fields and/or modify $item
    $extra = node_invoke_nodeapi($item, 'rss item');
    $extra = array_merge($extra, array(
      array(
        'key' => 'pubDate',
        'value' => gmdate('r', $item->created),
      ),
      array(
        'key' => 'dc:creator',
        'value' => $item->name,
      ),
      array(
        'key' => 'guid',
        'value' => $item->nid . ' at ' . $base_url,
        'attributes' => array(
          'isPermaLink' => 'false',
        ),
      ),
    ));
    foreach ($extra as $element) {
      if (isset($element['namespace'])) {
        $namespaces = array_merge($namespaces, $element['namespace']);
      }
    }

    // Prepare the item description
    switch ($item_length) {
      case 'fulltext':
        $item_text = $item->body;
        break;
      case 'teaser':
        $item_text = $item->teaser;
        if (!empty($item->readmore)) {
          $item_text .= '<p>' . l(t('read more'), 'node/' . $item->nid, array(
            'absolute' => TRUE,
            'attributes' => array(
              'target' => '_blank',
            ),
          )) . '</p>';
        }
        break;
      case 'title':
        $item_text = '';
        break;
    }
    $items .= format_rss_item($item->title, $item->link, $item_text, $extra);
  }
  $channel_defaults = array(
    'version' => '2.0',
    'title' => variable_get('site_name', 'Drupal'),
    'link' => $base_url,
    'description' => variable_get('site_mission', ''),
    'language' => $language->language,
  );
  $channel = array_merge($channel_defaults, $channel);
  $output = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
  $output .= "<rss version=\"" . $channel["version"] . "\" xml:base=\"" . $base_url . "\" " . drupal_attributes($namespaces) . ">\n";
  $output .= format_rss_channel($channel['title'], $channel['link'], $channel['description'], $items, $channel['language']);
  $output .= "</rss>\n";
  drupal_set_header('Content-Type: application/rss+xml; charset=utf-8');
  print $output;
}