FAPI redirect *and* store to local database

Question

What I'm trying to achieve

I am successfully using the Form API in Drupal 7 to dynamically alter Webforms to redirect to an off-site URL on submit.

What I need is twofold; I need (a) for the client to visit the offsite URL so the site can store a lead via query string parameters, as well as (b) for the same information to be documented in my local Drupal database.

Every lead must be documented, so I have tentatively ruled out JavaScript/AJAX as an option.

How I tried it

I thought the best way to do this was to set up a module with $form_state['redirect']:

/**
 * Implement hook_form_alter to change the form's submit action
 */
function myform_form_alter(&$form, &$form_state, $form_id) {
    $form['actions']['submit']['#submit'][]='myform_submit';
}

/**
 * Callback as specified above
 */
function myform_submit($form, &$form_state) {
    // Values for the query string
    $vals = array('mykey' => 'myval');

    // Redirect appropriately
    $form_state['redirect'] = array(
        // $path
        'http://www.anotherwebsite.com/',
        // $options
        array('query' => $vals),
        // $http_response_code
        302,
    );
}

I did that, and as expected, the user is redirected immediately after form submission. However, the Form API does not submit to my database before redirecting the user.

I read the FAPI documentation for Drupal 7. I sought using #action, although it apparently reports only accepting internal values and my users must visit an offsite URL. I wound up using redirect in the meantime, which was no longer documented but was suggested in the comments.

Where do I go from here?

EDIT: tenken's response works, but I have another problem!

My callback now uses array_unshift($form['#submit'],'my_callback') and via drupal_http_request, is submitting to both websites. However, my webform is still not saving submissions locally, and instead on submit, redirects to self (even with no hook_form_alter).

Answer 1

EDIT: added option (1) after thinking about this more, haha. It's a much simpler solution.

(1)

If the below is to complex you (and you actually want to POST something) you could form_alter the form and append your own additional FAPI #submit function which uses drupal_http_request() to POST/GET the url with all the submitted form params.

(2)

I think you want to set the destination value from within the #action of the form to be wherever the default webform submit path is and tag on a destination querystring parameter to the action which drupal will then goto after the form has been validated/submitted.

I know you said you tried using #action but I'm talking about the action being the drupal action and destination being a remote url (url-escaped).

Eg, I have customized a login form to use various login backend logic depending on the url of the login: /user/login, /student/login, /staff/login ... etc. I then make the destination of a succcessful login goto a specific drupal page. destination is used by drupal_goto() to redirect the user anywhere -- even an external url.

Here is a small example from code I have in D7:

/**
 * The following 2 functions allow our form overrides to occur.
 */
function MYMODULE_form_user_login_block_alter(&$form, &$form_state) {
  if (_MYMODULE_auth_is_student_login_page_url()) {
    $form = $form + array('#auth-destination' => 'student');
    _MYMODULE_auth_user_login_form_alter($form, $form_state);
  }
  if (_MYMODULE_auth_is_staff_login_page_url()) {
    $form = $form + array('#auth-destination' => 'staff');
    _MYMODULE_auth_user_login_form_alter($form, $form_state);
  }
}

function MYMODULE_form_user_login_alter(&$form, &$form_state) {
  if (_MYMODULE_auth_is_student_login_page_url()) {
    $form = $form + array('#auth-destination' => 'student');
    _MYMODULE_auth_user_login_form_alter($form, $form_state);
  }
  if (_MYMODULE_auth_is_id_login_page_url()) {
    $form = $form + array('#auth-destination' => 'staff');
    _MYMODULE_auth_user_login_form_alter($form, $form_state);
  }
}

function _MYMODULE_auth_user_login_form_alter(&$form, &$form_state) {
  global $conf;
  $saveForm = $form;
  $form = array();
  # overrides the default validator.
  foreach ($saveForm as $key => $value) {
    if ($key == '#validate') {
      $form[$key] = array();
      foreach ($value as $validator) {
        if ($validator == 'user_login_authenticate_validate') {
          // If we progressed down to this level of nested Alters, we have
          // #auth-destination.
          $type_of_login = $saveForm['#auth-destination'];
          switch($type_of_login) {
            case 'staff':
              // These functions are custom validate functions whose logic is
              // copied/altered from the default
              // 'user_login_authenticate_validate' implementation.
              $validator = 'MYMODULE_auth_staff_authenticate_validate';
              // the form posts back to itself and supplies a unique destintation.
              $form['#action'] = '/?q=staff/login&destination=%3Cfront%3E';
              break;
            case 'student':
              $validator = 'MYMODULE_auth_student_authenticate_validate';
              // the form posts back to itself and supplies a unique destintation.
              $form['#action'] = '/?q=student/login&destination=student/my-surveys';
              break;
            default:
              break;
          }
        }
        $form[$key][] = $validator;
      }
    }
    else {
      $form[$key] = $value;
    }
  }
  $form['name']['#title'] = ($type_of_login == 'Staff') ? 'Staff Username' : 'StudentCampusID';
  unset($form['links']);
}