function form_get_cache

Fetches a form from cache.

Related topics

File

includes/form.inc, line 517

Code

function form_get_cache($form_build_id, &$form_state) {
    if ($cached = cache_get('form_' . $form_build_id, 'cache_form')) {
        $form = $cached->data;
        global $user;
        if (isset($form['#cache_token']) && drupal_valid_token($form['#cache_token']) || !isset($form['#cache_token']) && !$user->uid) {
            if ($cached = cache_get('form_state_' . $form_build_id, 'cache_form')) {
                // Re-populate $form_state for subsequent rebuilds.
                $form_state = $cached->data + $form_state;
                // If the original form is contained in include files, load the files.
                // @see form_load_include()
                $form_state['build_info'] += array(
                    'files' => array(),
                );
                foreach ($form_state['build_info']['files'] as $file) {
                    if (is_array($file)) {
                        $file += array(
                            'type' => 'inc',
                            'name' => $file['module'],
                        );
                        module_load_include($file['type'], $file['module'], $file['name']);
                    }
                    elseif (file_exists($file)) {
                        require_once DRUPAL_ROOT . '/' . $file;
                    }
                }
            }
            // Generate a new #build_id if the cached form was rendered on a cacheable
            // page.
            if (!empty($form_state['build_info']['immutable'])) {
                $form['#build_id_old'] = $form['#build_id'];
                $form['#build_id'] = 'form-' . drupal_random_key();
                $form['form_build_id']['#value'] = $form['#build_id'];
                $form['form_build_id']['#id'] = $form['#build_id'];
                unset($form_state['build_info']['immutable']);
            }
            return $form;
        }
    }
}