MENU_CALLBACK, 'page callback' => 'image_captcha_refresh_ajax_refresh', 'page arguments' => array(2), 'access callback' => TRUE ); return $items; } /** * Implements hook_theme(). */ function image_captcha_refresh_theme() { return array( 'image_captcha_refresh_link' => array( 'variables' => array('url' => NULL) ) ); } /** * Image captcha refresh ajax handler. * @param $form_id For which form need refresh captcha image * @return Data in json format */ function image_captcha_refresh_ajax_refresh($form_id) { $GLOBALS['conf']['cache'] = FALSE; $result = array( 'status' => 0, 'message' => '' ); try { module_load_include('inc', 'captcha'); $captcha_sid = _captcha_generate_captcha_session($form_id); $captcha_token = md5(mt_rand()); $allowed_chars = _image_captcha_utf8_split(variable_get('image_captcha_image_allowed_chars', IMAGE_CAPTCHA_ALLOWED_CHARACTERS)); $code_length = (int) variable_get('image_captcha_code_length', 5); $code = ''; for ($i = 0; $i < $code_length; $i++) { $code .= $allowed_chars[array_rand($allowed_chars)]; } db_update('captcha_sessions') ->fields(array('token' => $captcha_token, 'solution' => $code)) ->condition('csid', $captcha_sid) ->execute(); $query = array( 'query' => array( 'sid' => $captcha_sid, 'ts' => REQUEST_TIME, ) ); $result['data'] = array( 'url' => url("image_captcha/$captcha_sid", $query), 'token' => $captcha_token, 'sid' => $captcha_sid ); $result['status'] = 1; } catch (Exception $e) { if ($message = $e->getMessage()) { $result['message'] = $message; } else { $result['message'] = t('Error has occured. Please contact the site administrator.'); } } drupal_json_output($result); } /** * Implementation of hook_form_alter(). * * This function adds the CAPTCHA refresh script to forms for untrusted users if needed. */ function image_captcha_refresh_form_alter(&$form, &$form_state, $form_id) { if (arg(0) != 'admin' || variable_get('captcha_allow_on_admin_pages', FALSE)) { module_load_include('inc', 'captcha', 'captcha'); $captcha_point = captcha_get_form_id_setting($form_id); if ($captcha_point && $captcha_point->captcha_type && $captcha_point->captcha_type == 'Image') { $form['#attached']['js'][] = drupal_get_path('module', 'image_captcha_refresh') . '/image_captcha_refresh.js'; } } } /** * Returns a link for refreshing captcha image. * * @ingroup themeable */ function theme_image_captcha_refresh_link($variables) { $output = '

'; $output .= l(t('Generate a new captcha'), $variables['url'], array('attributes' => array('class' => array('reload-captcha')))); $output .= '

'; return $output; } /** * Implements hook_element_info_alter(). */ function image_captcha_refresh_element_info_alter(&$element) { if (isset($element['captcha'])) { $element['captcha']['#after_build'][] = 'image_captcha_refresh_after_build_process'; } } /** * Add image refresh button to captcha form element * * @return * The processed element. * * @see captcha_element_info() * @see image_captcha_refresh_element_info_alter() */ function image_captcha_refresh_after_build_process($element, $form_state) { $form_id = $element['#captcha_info']['form_id']; $captcha_point = captcha_get_form_id_setting($form_id); if ($captcha_point && $captcha_point->captcha_type && $captcha_point->captcha_type == 'Image' && isset($element['captcha_widgets']['captcha_image'])) { $element['captcha_widgets']['captcha_refresh'] = array( '#markup' => theme('image_captcha_refresh_link', array('url' => 'captcha/refresh/' . $form_id)), ); } return $element; }