我覆盖了Woocommerce管理员的新电子邮件。另外，我还添加了一个过滤器，从ACF选项页面文件字段添加附件文件。

function attach_order_notice ( $attachments, $email_id, $order ) {
    // Only for "New Order" email notification (for admin)
    error_log( \'attachments: \'. print_r( get_field( \'email_file_attachment\', \'options\' )[\'url\'], true ) );

    //if( $email_id == \'new_order\' ){
        $attachments[] = get_field( \'email_file_attachment\', \'options\' )[\'url\'];
    //}
    return $attachments;
}
add_filter( \'woocommerce_email_attachments\', \'attach_order_notice\', 10, 3 );

当我查看日志时，我会得到一个PDF文件的URL，并且可以查看，当我收到电子邮件时，没有附加任何文件，没有附加到管理员电子邮件或客户电子邮件。

原因可能是什么？谢谢

function attach_order_notice ( $attachments, $email_id, $order ) {
    // Only for "New Order" email notification (for admin)

    //if( $email_id == \'new_order\' ){
        $file_path = wp_upload_dir()[\'path\'];
        $file_name = get_field( \'email_file_attachment\', \'options\' )[\'filename\'];
        $attachments[] = $file_path . \'/\' . $file_name;
    //}
    return $attachments;
}
add_filter( \'woocommerce_email_attachments\', \'attach_order_notice\', 10, 3 );