How to save and display user meta from Woocommerce order admin

Question

Customers have an extra field called billing_ean as part of their billing address.

I\'m using the following code to load, edit, and save their EAN number fr

Answer 1

Try the following instead, where the field displayed in order edit pages and the value is saved to order meta data and user meta data…

Your revisited code:

add_action( 'woocommerce_admin_order_data_after_billing_address', 'customer_ean_edit' );
function customer_ean_edit( $order ){
    $value = get_user_meta( $order->get_customer_id(), 'billing_eannr', true );
    ?>
    <div class="edit-address"><?php
        woocommerce_wp_text_input( array(
            'id' => 'billing_eannr',
            'label' => __('EAN nr.:', 'woocommerce'),
            'placeholder' => '',
            'value' => $value,
            'wrapper_class' => 'form-field-wide'
        ) );
    ?></div><?php
}


add_action('save_post_shop_order', 'customer_ean_save', 50, 3 );
function customer_ean_save( $post_id, $post, $update ) {

    // Checking that is not an autosave
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
        return $post_id;

    // Check the user’s permissions (for 'shop_manager' and 'administrator' user roles)
    if ( ! current_user_can( 'edit_shop_order', $post_id ) )
        return $post_id;

    if( isset($_POST['billing_eannr']) ) {
        $order = wc_get_order( $post_id );
        // Update order post meta data
        update_post_meta( $post_id, 'billing_eannr', sanitize_text_field( $_POST['billing_eannr'] ) );
        // Update user meta data
        update_user_meta( $order->get_customer_id(), 'billing_eannr', sanitize_text_field( $_POST['billing_eannr'] ) );
    }
}

Code goes in function.php file of the active child theme (or active theme). tested and works.