function drupal_render_children

Renders children of an element and concatenates them.

This renders all children of an element using drupal_render() and then joins them together into a single string.

Parameters

$element: The structured array whose children shall be rendered.

$children_keys: If the keys of the element's children are already known, they can be passed in to save another run of element_children().

File

includes/common.inc, line 5958

Common functions that many Drupal modules will need to reference.

Code

function drupal_render_children(&$element, $children_keys = NULL) {
  if ($children_keys === NULL) {
    $children_keys = element_children($element);
  }
  $output = '';
  foreach ($children_keys as $key) {
    if (!empty($element[$key])) {
      $output .= drupal_render($element[$key]);
    }
  }
  return $output;
}