警告：mysqli_stmt::bind_param()：变量数量与准备好的语句中的参数数量不匹配[重复]

我收到以下错误：

Warning: mysqli_stmt::bind_param(): Number of variables doesn't match number of parameters in prepared statement

我在绑定和执行准备语句时遇到问题。与数据库的连接已成功建立，并且确实设法将其插入到数据库中，初始值为?

下面是代码：

// Set up the query
$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent) 
VALUES ('?','?','?','?','?','?','?','?','?','?')";


// Prepare the statement
$insert = $con->prepare($insert);

// Bind the statement
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);

// Execute the statement
$insert->execute();

// Close the statement connection
$insert->close();

// Close the database connection
$con->close();

丢失周围的引号?并使用 10 个参数而不是 11 个

而不是这个：

$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent) 
VALUES ('?','?','?','?','?','?','?','?','?','?')";
$insert = $con->prepare($insert);
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);

尝试这个：

$insert = "INSERT INTO record_user (ip,country,address,stack,skills,employment_type,city_selection,landing_time,submission_time,time_spent)
VALUES (?,?,?,?,?,?,?,?,?,?)";
$insert = $con->prepare($insert);
$insert->bind_param("ssssssssss", $user_ip, $country, $location, $stack, $skills, $employment, $city, $landing_time, $submission_time, $time_spent);