Php 使用额外的输入字段自定义WooCommerce单个产品

您的代码有点过时和不完整.try 使用以下替换代码在购物车、结帐、订单和邮箱通知中显示自定义字段值:

add_action('woocommerce_before_add_to_cart_button', 'single_product_custom_field_display');
function single_product_custom_field_display() {
    echo '<div class="personalization-field">
    <label for="personalization">'.__('Personalization:').'</label>
    <input type="text" id="personalization" name="personalization" />
    </div>';
}

// Save custom fields as custom cart item data
add_filter('woocommerce_add_cart_item_data', 'add_custom_cart_item_data', 20, 2 );
function add_custom_cart_item_data( $cart_item_data, $product_id ) {
    if ( isset($_POST['personalization']) ) {
        $cart_item_data['personalization'] = sanitize_text_field($_POST['personalization']);
    }
    return $cart_item_data;
}

// Display custom fields in Cart and Checkout
add_filter( 'woocommerce_get_item_data', 'display_custom_cart_item_data', 20, 2 );
function display_custom_cart_item_data( $cart_data, $cart_item ) {
    if( isset($cart_item['personalization']) ) {
        $cart_data[] = array(
            'key'   => __('Personalization'),
            'value' => $cart_item['personalization'],
        );
    }
    return $cart_data;
}

// Save and display custom fields (custom order item metadata)
add_action( 'woocommerce_checkout_create_order_line_item', 'save_order_item_custom_meta_data6', 10, 4 );
function save_order_item_custom_meta_data6( $item, $cart_item_key, $values, $order ) {
    if( isset($values['personalization']) ) {
        $item->update_meta_data('personalization', $values['personalization']); 
    }
}

// Add readable "meta key" label name replacement
add_filter('woocommerce_order_item_display_meta_key', 'filter_wc_order_item_display_meta_key6', 10, 3 );
function filter_wc_order_item_display_meta_key6( $display_key, $meta, $item ) {
    if( $item->get_type() === 'line_item' ) {
        if( $meta->key === 'personalization' ) {
            $display_key = __('Personalization');
        }
    }
    return $display_key;
}

代码将在子主题的functions.php文件中(或插件中).测试和工作.

You will get:

在购物车和结帐页面:

在客户订单页面上:

关于邮箱通知:

在管理订单页面: