仅在某些电子邮件通知上显示自定义通知

可以使用基于订单状态的条件来仅针对特定的电子邮件通知来显示此自定义消息。

修改后的代码:

add_action('woocommerce_email_before_order_table', 'days_of_manufacture_view_order_and_email', 99);
function days_of_manufacture_view_order_and_email($order, $type='email') {
    // Defining the undesired orders status
    $not_this_statuses = array('wc-completed','wc-failed','wc-cancelled');
    if(!in_array($order->post_status, $not_this_statuses)){
        $day_txt = ' ' . __('day', 'your_theme_domain_slug' );
        $days_txt = ' ' . __('days', 'your_theme_domain_slug' );
        $max_days = 0;
        // Your customized style for the email template (to adapt for your needs)
        $style = 'border:solid 2px #ededed; padding:10px; font-weight:bold;';
        // Your customized text goes in here
        $text = __('Your Order will be produced in: ', 'your_theme_domain_slug' );
        foreach( $order->get_items() as $item )
            if(get_post_meta($item['product_id'], 'days_manufacture', true) > $max_days )
                $max_days = get_post_meta($item['product_id'], 'days_manufacture', true);
        if($max_days != 0) {
            if ($max_days == 1)
                $days_txt = $day_txt;
            $output = $text . $max_days . $days_txt;
            // displayed on the email notifications
            if($type == 'email')
                echo "<div class='woocommerce-info' style='$style'>$output</div>"; // <== Customize the styles if needed
            // displayed on the woocommerce templates
            else
                echo "<div class='woocommerce-info' style='display:block !important;'>$output</div>"; // displayed on the templates
        }
    }
}

代码放在你的活动子主题(或主题)的function.php文件或任何插件文件中。