function hook_node_view_alter

Alter the results of node_view().

This hook is called after the content has been assembled in a structured array and may be used for doing processing which requires that the complete node content structure has been built.

If the module wishes to act on the rendered HTML of the node rather than the structured content array, it may use this hook to add a #post_render callback. Alternatively, it could also implement hook_preprocess_HOOK() for node.tpl.php. See drupal_render() and theme() documentation respectively for details.

Parameters

$build: A renderable array representing the node content.

Drupal\node\Node $node: The node being rendered.

See also

node_view()

hook_entity_view_alter()

Related topics

Hooks
Allow modules to interact with the Drupal core.
Node API Hooks
Functions to define and modify content types.

File

drupal/core/modules/node/node.api.php, line 878
Hooks provided by the Node module.

Code

function hook_node_view_alter(&$build, Drupal\node\Node $node) {
  if ($build['#view_mode'] == 'full' && isset($build['an_additional_field'])) {

    // Change its weight.
    $build['an_additional_field']['#weight'] = -10;
  }

  // Add a #post_render callback to act on the rendered HTML of the node.
  $build['#post_render'][] = 'my_module_node_post_render';
}