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1. drupal
   1. drupal6
   2. drupal7

A validate handler on the login form. Should be the last validator. Sets an error if user has not been authenticated yet.

Code

modules/user/user.module, line 1347

<?php
function user_login_final_validate($form, &$form_state) {
  global $user;
  if (!$user->uid) {
    form_set_error('name', t('Sorry, unrecognized username or password. <a href="@password">Have you forgotten your password?</a>', array('@password' => url('user/password'))));
  }
}
?>