I'm trying to display the login form in a basic page. When I'm logged in, this redirects me to the user account page. When I'm logged out, this shows nothing.
<?php drupal_get_form("user_login"); ?>
Solved!
For D7:
<?php
$elements = drupal_get_form("user_login");
$form = drupal_render($elements);
echo $form;
?>
For D6:
<?php
echo drupal_get_form("user_login");
?>