这种错误通常是由于尝试在mysqli_result对象上执行数组操作引起的。要解决这个问题，需要使用mysqli_fetch_array（）函数将结果对象转换为数组。以下是一个示例代码，该代码从MySQL数据库中获取数据，将其转换为数组，并循环遍历结果：

$conn = mysqli_connect($servername, $username, $password, $dbname);

if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

$sql = "SELECT id, name, age FROM users";
$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {
    // Convert result object to array
    $users = mysqli_fetch_all($result, MYSQLI_ASSOC);
    
    // Loop through array
    foreach ($users as $user) {
        echo "ID: " . $user['id'] . ", Name: " . $user['name'] . ", Age: " . $user['age'] . "
";
    }
} else {
    echo "No results found";
}

mysqli_close($conn);