function node_load in Drupal 6

Same name and namespace in other branches

1. 8 core/modules/node/node.module \node_load()
2. 4 modules/node.module \node_load()
3. 5 modules/node/node.module \node_load()
4. 7 modules/node/node.module \node_load()

Load a node object from the database.

Parameters

$param: Either the nid of the node or an array of conditions to match against in the database query

$revision: Which numbered revision to load. Defaults to the current version.

$reset: Whether to reset the internal node_load cache.

Return value

A fully-populated node object.

43 calls to node_load()

blogapi_blogger_edit_post in modules/blogapi/blogapi.module

Blogging API callback. Modifies the specified blog node.

blogapi_blogger_get_post in modules/blogapi/blogapi.module

Blogging API callback. Returns a specified blog node.

blogapi_mt_get_post_categories in modules/blogapi/blogapi.module

Blogging API callback. Returns a list of the taxonomy terms that are assigned to a particular node.

blogapi_mt_publish_post in modules/blogapi/blogapi.module

Blogging API callback. Publishes the given node

blogapi_mt_set_post_categories in modules/blogapi/blogapi.module

Blogging API callback. Assigns taxonomy terms to a particular node.

... See full list

File

modules/node/node.module, line 709

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_load($param = array(), $revision = NULL, $reset = NULL) {
  static $nodes = array();
  if ($reset) {
    $nodes = array();
  }
  $cachable = $revision == NULL;
  $arguments = array();
  if (is_numeric($param)) {
    if ($cachable) {

      // Is the node statically cached?
      if (isset($nodes[$param])) {
        return is_object($nodes[$param]) ? drupal_clone($nodes[$param]) : $nodes[$param];
      }
    }
    $cond = 'n.nid = %d';
    $arguments[] = $param;
  }
  elseif (is_array($param)) {

    // Turn the conditions into a query.
    foreach ($param as $key => $value) {
      $cond[] = 'n.' . db_escape_table($key) . " = '%s'";
      $arguments[] = $value;
    }
    $cond = implode(' AND ', $cond);
  }
  else {
    return FALSE;
  }

  // Retrieve a field list based on the site's schema.
  $fields = drupal_schema_fields_sql('node', 'n');
  $fields = array_merge($fields, drupal_schema_fields_sql('node_revisions', 'r'));
  $fields = array_merge($fields, array(
    'u.name',
    'u.picture',
    'u.data',
  ));

  // Remove fields not needed in the query: n.vid and r.nid are redundant,
  // n.title is unnecessary because the node title comes from the
  // node_revisions table.  We'll keep r.vid, r.title, and n.nid.
  $fields = array_diff($fields, array(
    'n.vid',
    'n.title',
    'r.nid',
  ));
  $fields = implode(', ', $fields);

  // Rename timestamp field for clarity.
  $fields = str_replace('r.timestamp', 'r.timestamp AS revision_timestamp', $fields);

  // Change name of revision uid so it doesn't conflict with n.uid.
  $fields = str_replace('r.uid', 'r.uid AS revision_uid', $fields);

  // Retrieve the node.
  // No db_rewrite_sql is applied so as to get complete indexing for search.
  if ($revision) {
    array_unshift($arguments, $revision);
    $node = db_fetch_object(db_query('SELECT ' . $fields . ' FROM {node} n INNER JOIN {users} u ON u.uid = n.uid INNER JOIN {node_revisions} r ON r.nid = n.nid AND r.vid = %d WHERE ' . $cond, $arguments));
  }
  else {
    $node = db_fetch_object(db_query('SELECT ' . $fields . ' FROM {node} n INNER JOIN {users} u ON u.uid = n.uid INNER JOIN {node_revisions} r ON r.vid = n.vid WHERE ' . $cond, $arguments));
  }
  if ($node && $node->nid) {

    // Call the node specific callback (if any) and piggy-back the
    // results to the node or overwrite some values.
    if ($extra = node_invoke($node, 'load')) {
      foreach ($extra as $key => $value) {
        $node->{$key} = $value;
      }
    }
    if ($extra = node_invoke_nodeapi($node, 'load')) {
      foreach ($extra as $key => $value) {
        $node->{$key} = $value;
      }
    }
    if ($cachable) {
      $nodes[$node->nid] = is_object($node) ? drupal_clone($node) : $node;
    }
  }
  return $node;
}