检查用户是否在 WooCommerce 电子邮件通知中免征增值税

Question

在发送给管理员的 WooCommerce 新订单电子邮件通知中，我试图在用户“免征增值税”时显示“免税订单”附加文本，使用以下内容：

add_action( 'woocommerce_email_before_order_table', 'add_content_specific_email', 20, 4 );

function add_content_specific_email( $order, $sent_to_admin, $plain_text, $email ) {
    // Only for admin emails
    if ( ! $sent_to_admin ) {
        return;
    }
    if ( $email->id == 'new_order' &&  !(WC()->customer->get_is_vat_exempt()) && $sent_to_admin ){
        return;
    }
    if ( $email->id == 'new_order' &&  WC()->customer->get_is_vat_exempt() && $sent_to_admin) {
        echo '<h2 class="email-tax-free-title">Tax Free Order</h2></p>';
    }
}

在某些情况下，我会收到以下错误：

Uncaught Error: Call to a member function get_is_vat_exempt() on null
#0 /home/site/public_html/wp-includes/class-wp-hook.php(287): add_content_specific_email(Object(Automattic\WooCommerce\Admin\Overrides\Order), true, false, Object(WC_Email_New_Order))
#1 /home/site/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#2 /home/site/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /home/site/public_html/wp-content/plugins/woocommerce/templates/emails/email-order-details.php(22): do_action('woocommerce_ema...', Object(Automattic\WooCommerce\Admin\Overrides\Order), true, false, Object(WC_Email_New_Order))
#4 /home/site/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(344): include('/home/site/...')
#5 /home/site/public_html/wp-content/plugins/woocommerce/includes/class-wc-emails.php(421): wc_get

如何解决这个错误？我的代码有错误吗？

Answer 1

已更新

您的代码中有一些错误。为了避免这个错误，需要检查订单元数据is_vat_exempt的值是否为'yes'，如下：

add_action( 'woocommerce_email_before_order_table', 'new_order_email_is_vat_exempt', 20, 4 );
function new_order_email_is_vat_exempt( $order, $sent_to_admin, $plain_text, $email ) {
    // Only for new order admin email notification
    if ( $sent_to_admin && 'new_order' === $email->id ) {
        // Check if user is VAT exempt for the current order
        if( 'yes' === $order->get_meta( 'is_vat_exempt' ) ) {
            echo '<h2 class="email-tax-free-title">Tax Free Order</h2></p>';
        }
    }
}

代码进入活动子主题（或活动主题）的 functions.php 文件。已测试并有效。

检查用户是否在 WooCommerce 电子邮件通知中免征增值税

Check if user is VAT exempt on WooCommerce email notifications

php

wordpress

user-data

orders

woocommerce