Exclude empty fields from emails

How to exclude empty fields from your WordPress email after form submission

Super Forms also has an option that does this for you on the form builder page under Form Settings > Confirmation E-mail > Exclude empty values from email loop

add_filter( 'super_before_sending_email_data_filter', '_super_exclude_empty_field_from_email', 10, 2 );
function _super_exclude_empty_field_from_email( $data, $atts ) {

    // REPLACE 123 WITH YOUR FORM ID
    $id = 123;

    $form_id = absint($atts['post']['form_id']); // contains the form ID that was submitted

    if( $form_id == $id ) {
        foreach( $data as $k => $v ) {
            if( $v['type']=='files' ) {
                if( !isset($v['files']) ) {
                    // 1 = Exclude from confirmation email only
                    // 2 = Exclude from all emails
                    $data[$k]['exclude'] = 2;
                }
                continue;
            }

            // We exclude whenever the field value equals 0 or when the value was empty
            if( ($v['value']=='0') || ($v['value']=='') ) {
                // 1 = Exclude from confirmation email only
                // 2 = Exclude from all emails
                $data[$k]['exclude'] = 2;
            }
        }
    }
    return $data;
}