Computed value on multipage Webform

Question

I have multipage webform. I want to compute the value of the component (Hidden -type) which is on the second page based on the data submitted on the first page.

I'm using hook_form_alter and added my client_submit handler:

function mymodule_client_submit(&$form, &$form_state)

I can read there submitted data from the first page and I can do the calculation. But I cannot set the value of the component from the second page. I can see the structure of the form in $form or $form_state parameter. But I do not know how to set the value of the component from the second page as it was not submitted yet.

Answer 1

I can suggest you a simple way to do this. You can pass the calculated value stored in a variable to the next form function.

Like I had two step form & at first step of the form user select some name from given name(checkboxes), I store them in array & pass them to the next form function like --

function MYMODULE_form($names)//Use your module name instead of MYMODULE.
{
  $return_form = drupal_get_form('MYMODULE_get_form', $names);
  return drupal_render($return_form);
}
function MYMODULE_get_form($form, &$form_state, $names)
{
  $form = array();
  $i = 0;
  foreach($names as $name)
  {
    $form['item']['name'.$i] = array(
      '#type' => 'markup',
      '#value' => $name,
    );
    $i++;
  }
}

Try something like this, if it solves your problem. Use simple variable if you don't have multiple values.