mypluging.php

<?php

function laf_woocommerce_checkout_update_order_review($post_data)
{
    if (!empty($post_data)) {
        parse_str($post_data, $data);
    }
    else
        return false;

    WC()->customer->set_props( array(
        'billing_first_name' => isset( $data['billing_first_name'] ) ? wp_unslash( $data['billing_first_name'] ) : null,
        'billing_last_name'  => isset( $data['billing_last_name'] )  ? wp_unslash( $data['billing_last_name'] )  : null,
        'billing_company'    => isset( $data['billing_company'] )    ? wp_unslash( $data['billing_company'] )    : null,
        'billing_phone'      => isset( $data['billing_phone'] )      ? wp_unslash( $data['billing_phone'] )      : null,
        'billing_email'      => isset( $data['billing_email'] )      ? wp_unslash( $data['billing_email'] )      : null
    ) );

    if ( wc_ship_to_billing_address_only() ) {
        WC()->customer->set_props( array(
            'shipping_first_name' => isset( $data['billing_first_name'] ) ? wp_unslash( $data['billing_first_name'] ) : null,
            'shipping_last_name'  => isset( $data['billing_last_name'] )  ? wp_unslash( $data['billing_last_name'] )  : null,
            'shipping_company'    => isset( $data['billing_company'] )    ? wp_unslash( $data['billing_company'] )    : null,
            'shipping_phone'      => isset( $data['billing_phone'] )      ? wp_unslash( $data['billing_phone'] )      : null,
            'shipping_email'      => isset( $data['billing_email'] )      ? wp_unslash( $data['billing_email'] )      : null
        ) );
    } else {
        WC()->customer->set_props( array(
            'shipping_first_name' => isset( $data['shipping_first_name'] ) ? wp_unslash( $data['shipping_first_name'] ) : null,
            'shipping_last_name'  => isset( $data['shipping_last_name'] )  ? wp_unslash( $data['shipping_last_name'] )  : null,
            'shipping_company'    => isset( $data['shipping_company'] )    ? wp_unslash( $data['shipping_company'] )    : null,
            'shipping_phone'      => isset( $data['shipping_phone'] )      ? wp_unslash( $data['billing_phone'] )       : null,
            'shipping_email'      => isset( $data['shipping_email'] )      ? wp_unslash( $data['shipping_email'] )      : null
        ) );
    }
}
add_action('woocommerce_checkout_update_order_review', 'laf_woocommerce_checkout_update_order_review');