Login Form Filters not working

[davidp98]

Hi, after searching and get it into several parts, I think it is possibly a bug.

Hi, I'm trying to use a filter (documented here ​http://codex.wordpress.org/Customizing_the_Login_Form) on the login page of my wordpress based web, but it does not work, I'm trying to insert a text immediately after opening the form tag:

add_filter( 'login_form_top', 'message_top' );function message_top(){return 'This is what I want it to say!';}

I add the code in functions.php and nothing happens.
But the strange thing of that is if I change the filter, e.g:

add_filter( 'login_message', 'message_top' );function message_top(){return 'This is what I want it to say!';} 

It works (outside the form tag). Looking the code of wp-login.php (WP 4.0) I can see the call to this filter (login_form_top) is never made although it is documented (​http://codex.wordpress.org/Customizing_the_Login_Form)

It could be a bug or I am missing something?

Thanks in advance and excuse my bad english

[SergeyBiryukov]

That action is specific to ​wp_login_form() function, which can be used for custom login forms.

For the default form, use ​login_form or any other appropriate action in wp-login.php.