I have a lot of pages with standalone forms. Because of webdesign issues I ended up using the form element to style.

The problem is certain actions cause the form-id to change.

<form id="user-profile-form">

 //a failed file upload causes the above to become

<form id="user-profile-form--2">

Which breaks a lot of my css.

An example form HTML profile:

<form id="user-profile-form" accept-charset="UTF-8" method="post" action="/drupalie/user/184/edit" enctype="multipart/form-data">
        /*form is built in here*/

Is there a way to add a CSS class to my form, add a class to the empty div which surrounds all the form elements or as a last resort, prevent the form increment on certain forms.

  • I posted an answer, but next time please at least read the docs, OK? Form API reference is a must-have, no one can remember everything so I strongly suggest bookmarking it and keeping it open during form development.
    – Mołot
    Oct 25, 2013 at 12:58
  • Aah shoot, sorry I should've checked that. I just assumed it was only used for elements. Thank you for answering anyway! Oct 25, 2013 at 13:02
  • It's somehow misleading format of Form API docs... there is "pseudo-element" form listed in it, that represents overall form. But I agree it's easy to miss it - it looks like real elements in the table.
    – Mołot
    Oct 25, 2013 at 13:12
  • Feature request to documentation team here
    – Mołot
    Oct 25, 2013 at 13:21

1 Answer 1


You can add classes you need directly to your form with #attributes. This is example directly from the official documentation:

$form['#attributes'] = array('class' => array('search-form'));

If it's not your code that creates form, you can add this with hook_form_alter(). Just be careful not to overwrite any attributes or classes that might be already in place:

$form['#attributes']['class'][] = 'search-form';

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