function form_render in Drupal 4

Renders a HTML form given a form tree. Recursively iterates over each of the form elements, generating HTML code. This function is usually called from within a theme. To render a form from within a module, use drupal_get_form().

Parameters

$elements: The form tree describing the form.

Return value

The rendered HTML form.

Related topics

29 calls to form_render()

drupal_get_form in includes/form.inc

Processes a form array and produces the HTML output of a form. If there is input in the $_POST['edit'] variable, this function will attempt to validate it, using drupal_validate_form(), and then submit the form using drupal_submit_form().

theme_aggregator_page_list in modules/aggregator.module

theme_archive_browse_form in modules/archive.module

Form theme function; displays the archive date navigation form inline.

theme_block_admin_display in modules/block.module

Theme main block administration form submission.

theme_book_admin_table in modules/book.module

... See full list

File

includes/form.inc, line 523

Code

function form_render(&$elements) {
  if (!isset($elements)) {
    return NULL;
  }
  $content = '';
  uasort($elements, "_form_sort");
  if (!isset($elements['#children'])) {
    $children = element_children($elements);

    /* Render all the children that use a theme function */
    if (isset($elements['#theme']) && !$elements['#theme_used']) {
      $elements['#theme_used'] = TRUE;
      $previous = array();
      foreach (array(
        '#value',
        '#type',
        '#prefix',
        '#suffix',
      ) as $key) {
        $previous[$key] = isset($elements[$key]) ? $elements[$key] : NULL;
      }

      // If we rendered a single element, then we will skip the renderer.
      if (empty($children)) {
        $elements['#printed'] = TRUE;
      }
      else {
        $elements['#value'] = '';
      }
      $elements['#type'] = 'markup';
      unset($elements['#prefix'], $elements['#suffix']);
      $content = theme($elements['#theme'], $elements);
      foreach (array(
        '#value',
        '#type',
        '#prefix',
        '#suffix',
      ) as $key) {
        $elements[$key] = isset($previous[$key]) ? $previous[$key] : NULL;
      }
    }

    /* render each of the children using form_render and concatenate them */
    if (!isset($content) || $content === '') {
      foreach ($children as $key) {
        $content .= form_render($elements[$key]);
      }
    }
  }
  if (isset($content) && $content !== '') {
    $elements['#children'] = $content;
  }

  // Until now, we rendered the children, here we render the element itself
  if (!isset($elements['#printed'])) {
    $content = theme($elements['#type'] ? $elements['#type'] : 'markup', $elements);
    $elements['#printed'] = TRUE;
  }
  if (isset($content) && $content !== '') {
    $prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
    $suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
    return $prefix . $content . $suffix;
  }
}