How to use add an opt-in checkbox for MailChimp

Created by Phil Kurth, Modified on Fri, 11 Nov, 2022 at 3:02 PM by Phil Kurth

If you are connecting an Advanced Form to MailChimp and need to restrict MailChimp sign ups based on a condition, you may do so using a custom submission handler to override the form's MailChimp configuration dynamically during submit.

In the below example, we check to see if the submission has a checked true/false field named 'add_to_mailchimp'. If it doesn't, the form's MailChimp configuration is set to FALSE which prevents the data from being sent to MailChimp.

// Use a true/false field as an opt-in for MailChimp.
add_filter( 'af/form/submission', function ( $form, $fields, $args ) {

  // If we aren't handling the desired form, return early.
  if ( $form['key'] !== 'FORM_KEY_HERE' ) {
    return $form;
  }

  // If a particular true/false field isn't checked, disable the MailChimp integration for this submission.
  if ( ! af_get_field( 'add_to_mailchimp' ) ) {
    $form['mailchimp'] = false;
  }

  return $form;

}, 5, 3 );