I am able to send a copy for one form using the code you provided, but not sure what the code would be to have more than one form send a copy (obviously at different times when the user submits the form). I tried simply copying the same code twice and just changing the iphorm values to list the second form, but it does not work. Here is what I have using your code and one form to send a copy to the email address provided by the user submitting the form. Thank you for your assistance.
function my_send_form_user_copy($mailer, $form, $attachments)
{
$email = $form->getValue('iphorm_28_56'); if ($email) {
$mailer->AddAddress($email);
$mailer->SingleTo = true; // Hide the recipient email addresses from each other
}
return $mailer;
}
add_filter('iphorm_pre_send_notification_email_28', 'my_send_form_user_copy', 10, 3);