How to fix 'Uncaught Error: Call to a member function fetch_assoc() on integer'

Question

我运行正在查询以接收参加比赛的电子邮件列表，通知他们比赛已经结束以及比赛何时结束运行。

我查看了代码，看不出哪里失败了。我正在绑定 ID，并且在执行查询时我也收到了正确的数据。

这是我正在运行ning 的函数。

function notifyEntrants($id, $sendMsg){
    $connect = db();
    $stmt = $connect->prepare('SELECT DISTINCT CONCAT(`payer`.`FirstName`, " ", `payer`.`LastName`) AS "Name", `payer`.`Email` AS "Email" FROM `transaction` INNER JOIN `payer` ON `payer`.`DrawID` = `transaction`.`DrawID` WHERE `transaction`.`DrawID` = ?;');
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $result = $stmt->get_result();
    $drawTitle = getTitle($id);

    while($row = $result->fetch_assoc()){
        $email = $row['Email'];
        $name = $row['Name'];
        // Create the Transport
        $transport = (new Swift_SmtpTransport('smtp.gmail.com', 465, 'ssl'))
          ->setUsername(SITE_EMAIL)
          ->setPassword(MAIL_PASS)
        ;

        $sendMsg .= "<br><br><a href=" . SITE_URL . "entries?id=".$id.">Click here</a> to see the entry list for this draw.";

        // Create the Mailer using your created Transport
        $mailer = new Swift_Mailer($transport);

        // Create a message
        $message = (new Swift_Message("Live draw confirmation for $drawTitle"))
          ->setFrom([SITE_EMAIL => SITE_NAME])
          ->setTo([$email => $name])
          ->setBody($sendMsg, 'text/html');

        // Send the message
        $result = $mailer->send($message);
    }
}

//echo notifyEntrants(15, "test");

在 var_dump 我得到了这个 array(2) { ["Name"]=> string(6) "Aidan " ["Email"]=> string(22) "adonnelly759@qub.ac.uk" } 这正是我所期待的。只有一个电子邮件地址和用户名。

然而这最终导致了错误："Fatal error: Uncaught Error: Call to a member function fetch_assoc() on integer".

提前致谢，抱歉，如果这很简单，我只是无法理解这个问题的按钮。

Answer 1

您正在用此行覆盖 SQL 结果：

$result = $mailer->send($message);

您需要为其中之一指定一个不同的名称。

How to fix 'Uncaught Error: Call to a member function fetch_assoc() on integer'

How to fix 'Uncaught Error: Call to a member function fetch_assoc() on integer'

php

mysql

prepared-statement