Crochet en Drupal inscription et de valider les infos de l'utilisateur à l'encontre de la logique métier

Vous devriez vous inscrire à une validation supplémentaire de fonction de rappel pour le formulaire d'inscription à l'aide de hook_form_FORM_ID_alter(), un peu comme ceci:

//Alter the registration form
function yourModuleName_form_user_register_alter(&$form, &$form_state) {
  //Add your own function to the array of validation callbacks
  $form['#validate'][] = 'yourModuleName_user_register_validate';
}

//Perform your own validation
function yourModuleName_user_register_validate($form, &$form_state) {
  //Extract the submitted name
  $name = $form_state['values']['name'];
  //Check it according to your own logic
  $is_valid_name = your_check_for_valid_name();
  //File error, when not valid
  if (!$is_valid) {
    form_set_error('name', t('Name already taken, please choose a different one'));
  }
}

Voici quelques exemples pour Drupal 7:

/**
 * Implements of hook_user_insert().
 */
function foo_user_insert(&$edit, $account, $category) {
  //foo_user_submit($edit, $account);
}

/**
 * Implementation of hook_user_delete().
 */
function foo_user_delete($account) {
  //foo_user_delete($account);
}

/**
 * Implements hook_form_FORM_ID_alter().
 * Form ID: user_register_form
 */
function foo_form_user_register_form_alter($form, &$form_state) {
  if ($form['#user_category'] == 'account' && !isset($form['#user']->uid)) {
    //Foo code
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 * Form ID: user_profile_form
 */
function foo_form_user_profile_form_alter($form, &$form_state) {
  //Set a custom form validate and submit handlers.
  $form['#validate'][] = 'foo_account_validate';
  $form['#submit'][] = 'foo_account_submit';
}

/**
 * Implements of hook_form_alter().
 * This is the same as: hook_form_FORM_ID_alter()
 */
function foo_form_alter(&$form, $form_state, $form_id) {
  switch ($form_id) {
    case "user_profile_form":
    case "user_register_form":
      break;
  }
}