Check your version

This video covers a topic in Drupal 7 which may or may not be the version you're using. We're keeping this tutorial online as a courtesy to users of Drupal 7, but we consider it archived.

Alternate resources: 

Guide: Develop Drupal Sites

Altering specific forms and customizing validation

Video loading...

Join Drupalize.Me to watch this video

Join today and gain instant access to our entire video library.

Log in Sign up
  • 0:08
    So there's another way you can change someone else's form.
  • 0:11
    I just previously discussed hook_form_alter which is called on all forms,
  • 0:15
    which is why we need to use that switch statement.
  • 0:17
    But there's also hook_form_FORM_ID_alter,
  • 0:22
    which only gets called for that specific form ID.
  • 0:26
    So I'd like to show you another example.
  • 0:29
    Let's go back and use our hook_form_alter
  • 0:34
    just to get the form_id.
  • 0:36
    So we know what to put in place.
  • 0:38
    I'm going to go ahead and comment out my $form as well.

Module Development for Drupal 7

Loading ...

Altering Specific Forms and Customizing Validation

Loading...
14 minutes 9 seconds // Drupal 7 // HDCC //

This video shows how to target a specific form with the hook_form_FORM_ID_alter and creating a customized validation function for a form.

Note: There is a typo in this video. (The code is correct in the downloadable example file attached to the previous video.)

In the demo_validate_password() function, the following line shown in the video if (in_array($form['values']['pass'], $badpasswords)) { should be if (in_array($form_state['values']['pass'], $badpasswords)) {.

Additional resources:
There are no resources for this video. If you believe there should be, please contact us.