Profile: martinH-10

Problem: I have two Forms. When one Form is submitted, I would like to redirect the User to the second Form, but I would like to add a URL parameter based on the selections in Form 1. That URL parameter should be used to preselect one of the fields in Form 2.

Solution: The cred_field shortcode accepts an attribute called "urlparam" that you can use to pre-define field values. For example:

[cred_field field="mobile" post="agent" urlparam="mobilenum"]

Then in the URL:
http://yoursite.com/form-page?mobilenum=123-456-7890

To set a URL parameter value in the redirect URL based on a custom field selection, use the cred_success_redirect API:

add_filter('cred_success_redirect', 'custom_purchase_redirect',10,3);
function custom_purchase_redirect($url, $post_id, $form_data)
{
  if ($form_data['id']==12345) {
    $email = get_post_meta( $post_id, 'wpcf-e-mail', true );
    $phone = get_post_meta( $post_id, 'wpcf-telefonni-cislo', true);
    $redirect = $url . "?fapi-form-email=" . $email . "&fapi-form-phone=" . $phone;
    return $redirect;
  }
  return $url;
}

Relevant Documentation:
https://toolset.com/documentation/user-guides/cred-shortcodes/#cred_field