无法将mysqli_result类的对象转换为字符串 [英] Object of class mysqli_result could not be converted to string in

问题描述

我遇到了错误:

Object of class mysqli_result could not be converted to string

这是我的代码:

$username2 = htmlentities($_SESSION['user']['username'], ENT_QUOTES, 'UTF-8');

$con = mysqli_connect('localhost','root','','test');

$result = mysqli_query($con, "SELECT classtype FROM learn_users
                        WHERE username='$username2';");

echo "my result <a href='data/$result.php'>My account</a>";

推荐答案

mysqli_query()将对象资源返回到您的$result变量，而不是字符串.

您需要将其循环播放，然后访问记录.您只是不能直接将其用作您的$result变量.

The mysqli_query() returns an object resource to your $result variable, not a string.

You need to loop it up and then access the records. You just can't directly use it as your $result variable.

while ($row = $result->fetch_assoc()) {
    echo $row['classtype']."<br>";
}

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