How to check two ACF checkboxes upon WP registration using a single checkbox?

• phish

• November 6, 2014 at 4:17 am

I’m using a custom registration form for WordPress registration. I’ve added a single checkbox and need to check two ACF checkboxes on the back-end if the user checks this box.

I’ve tried using the code below to hook into the user_register function in WordPress, but the boxes are not checked when I view the WP user under Extended Fields.

function register_hook ( $user_id ) {
  // if custom checkbox is checked, check both of these checkboxes from acf
  if ( $_POST['checkbox'] == 'yes' ) {
    update_user_meta( $user_id, 'field_98_0', 'newsletter 1' );
    update_user_meta( $user_id, 'field_99_1', 'newseletter 2' );
  }
}
add_action( 'user_register', 'register_hook' );

Any help would be greatly appreciated.