function yak_contribute_zip($form_id) {
?>
        <div id="give-zipcode-wrap">
            <label class="give-label" for="give-zipcode"><? _e('Zip Code', 'give'); ?>
            <span class="give-required-indicator">*</span>
                <span class="give-tooltip icon icon-question" data-tooltip="<?php _e( 'We are required to record Zip Codes for compliance with state and federal law.', 'give' ) ?>"></span>
            </label>
            <input type="number" class="give-text-input" name="give_zipcode" id="give-zipcode" placeholder="Zip Code" required>
        </div>
<?
}
add_action('give_before_donation_levels', 'yak_contribute_zip', 10, 2);

function yak_contribute_validate_zip($valid_data, $data) {
    if (empty( $data['give_zipcode'])) {
        give_set_error('give_zipcode', __('Zip Code is required.', 'give'));
    }
}
add_action('give_checkout_error_checks', 'yak_contribute_validate_zip', 10, 3);

function yak_contribute_store_zip( $payment_meta ) {
    $payment_meta['zipcode'] = isset( $_POST['give_zipcode'] ) ? implode( "n", array_map( 'sanitize_text_field', explode( "n", $_POST['give_zipcode'] ) ) ) : '';

    return $payment_meta;
}

add_filter('give_payment_meta', 'yak_contribute_store_zip');

function yak_show_zip_in_contributions_list( $payment_meta, $user_info ) {
    if ( ! isset( $payment_meta['zipcode'] ) ) {
        return;
    }

    ?>
    <div class="zipcode-data">
        <label><?php echo __( 'Zip Code:', 'give' ); ?></label>
        <?php echo wpautop( $payment_meta['zipcode'] ); ?>
    </div>

<?
}
add_action( 'give_payment_personal_details_list', 'yak_show_zip_in_contributions_list', 10, 4);