Php 更改电子邮件通知上的文本

我正在使用WordPress的RSVP插件，并对其进行了修改，以便它可以显示哪些客人被邀请参加哪些活动。当他们进入RSVP时，它会发送一封电子邮件，目前看起来如下：

if((get_option(OPTION_NOTIFY_ON_RSVP) == "Y") && (get_option(OPTION_NOTIFY_EMAIL) != "")) {
    $sql = "SELECT firstName, lastName, rsvpStatus FROM ".ATTENDEES_TABLE." WHERE id= ".$attendeeID;
    $attendee = $wpdb->get_results($sql);
    if(count($attendee) > 0) {
        $body = "Hello, \r\n\r\n";

        $body .= stripslashes($attendee[0]->firstName)." ".stripslashes($attendee[0]->lastName).
                         " has submitted their RSVP and has RSVP'd with '".$attendee[0]->rsvpStatus."'.";

        wp_mail(get_option(OPTION_NOTIFY_EMAIL), "New RSVP Submission", $body);
    }
}

在我的数据库中，我有一个名为rsvpEvent的字段，我希望它能够获取数据并向该事件显示此人的RSVP。我已尝试将此添加到其中：

if((get_option(OPTION_NOTIFY_ON_RSVP) == "Y") && (get_option(OPTION_NOTIFY_EMAIL) != "")) {
    $sql = "SELECT firstName, lastName, rsvpStatus FROM ".ATTENDEES_TABLE." WHERE id= ".$attendeeID;
    $attendee = $wpdb->get_results($sql);
    if(count($attendee) > 0) {
        $body = "Hello, \r\n\r\n";

        $body .= stripslashes($attendee[0]->firstName)." ".stripslashes($attendee[0]->lastName).
                          "has been invited to '".$attendee[0]->rsvpEvent."'." "and has submitted their RSVP and has RSVP'd with '".$attendee[0]->rsvpStatus."'.";

        wp_mail(get_option(OPTION_NOTIFY_EMAIL), "New RSVP Submission", $body);
    }
}

---

但是它破坏了我的整个网站，有人能给我一些提示或提示我哪里出了问题吗？

你没有从数据库中获得rsvpEvent字段

尝试将其添加到SELECT查询中，如中所示：

if((get_option(OPTION_NOTIFY_ON_RSVP) == "Y") && (get_option(OPTION_NOTIFY_EMAIL) != "")) {
    $sql = "SELECT firstName, lastName, rsvpStatus, rsvpEvent FROM ".ATTENDEES_TABLE." WHERE id= ".$attendeeID;
    $attendee = $wpdb->get_results($sql);
    if(count($attendee) > 0) {
        $body = "Hello, \r\n\r\n";

        $body .= stripslashes($attendee[0]->firstName)." ".stripslashes($attendee[0]->lastName).
                          "has been invited to '".$attendee[0]->rsvpEvent."'." "and has submitted their RSVP and has RSVP'd with '".$attendee[0]->rsvpStatus."'.";

        wp_mail(get_option(OPTION_NOTIFY_EMAIL), "New RSVP Submission", $body);
    }
}

---

我的错误我忘了把它加进去（打在头上），是的，我已经尝试并上传了，但仍然出现了服务器错误：（使用a，在上传错误代码之前，你会看到语法错误。