Hook changes

Other than those mentioned above, the following hooks have changed:

• The _view hook has been changed to return its content rather than printing it. It also has an extra parameter, $page, that indicates whether the node is being viewed as a standalone page or as part of a larger context. This is important because nodes may change the breadcrumb trail if they are being viewed as a page. Old usage:
  
  <?php
function example_view($node, $main = 0) {
  if ($main) {
    theme("node", $node, $main);
  }
  else {

    $breadcrumb[] = l(t("Home"), "");
    $breadcrumb[] = l(t("foo"), "foo");
    $node->body = theme("breadcrumb", $breadcrumb) ."<br />". $node->body;
    theme("node", $node, $main);
  }
}
?>
  
  New usage:
  
  <?php
function example_view($node, $main = 0, $page = 0) {
  if ($main) {
    return theme("node", $node, $main, $page);
  }
  else {
    if ($page) {
      $breadcrumb[] = l(t("Home"), "");
      $breadcrumb[] = l(t("foo"), "foo");
      drupal_set_breadcrumb($breadcrumb);
    }
    return theme("node", $node, $main, $page);
  }
}
?>
• The _form hook used by node modules no longer takes 3 arguments. The second argument $help, typically used to print submission guidelines, has been removed. Instead, the help should be emitted using the module's _help hook. For examples, check the story, forum or blog module.
• The _search hook was changed to not only return the result set array, but a two element array with the result group title and the result set array. This provides more precise control over result group titles.
• The _head hook is eliminated and replaced with the drupal_set_html_head() and drupal_get_html_head() functions. You can add JavaScript code or CSS to the HTML head part with the drupal_set_html_head() function instead.
• See also the description of the _compose_tips hook changes below.