'fieldset', ); $form['wrapper_fieldset']['two_words_required'] = array( '#title' => t('At least two words are required in this textfield'), '#type' => 'textfield', '#default_value' => !empty($form_state['values']['two_words_required']) ? $form_state['values']['two_words_required'] : '', '#ahah' => array( 'path' => 'examples/ahah_example/simple_validation/callback', 'wrapper' => 'two_words_required_wrapper', ), '#prefix' => '

', '#suffix' => '

', ); $form['submit'] = array( '#type' => 'submit', '#value' => t('Click Me'), ); return $form; } /** * Validation function for the form. Requires that two words be entered. */ function ahah_example_simple_validation_validate(&$form, &$form_state) { $words = explode(' ', $form_state['values']['two_words_required']); if (count($words) < 2) { form_set_error('two_words_required', t('You have to enter at least two words')); } } /** * Submit handler for autocheckboxes. * Gets called even when our select is active, so we use the * $form_state to determine whether the submit handler should actually do * anything. */ function ahah_example_simple_validation_submit($form, &$form_state) { if (!empty($form_state['ahah_submission'])) { return; } // Continue to handle submit processing. } /** * Callback for autocheckboxes. Process the form with the number of checkboxes * we want to provide. */ function ahah_example_simple_validation_callback() { $form = ahah_example_callback_helper(); // This section prepares the actual output that will be returned to the // browser. $selected_portion = $form['wrapper_fieldset']['two_words_required']; // To avoid doubling-up the wrapper, we have to remove it here. unset($selected_portion['#prefix'], $selected_portion['#suffix']); // Now render and output. $output = drupal_render($selected_portion); // Include (optionally) the results of any drupal_set_message() calls that // may have occurred. $output .= theme('status_messages'); // Output the results and exit. print drupal_json(array('status' => TRUE, 'data' => $output)); exit(); }