将客户IP插入数据库

Question

我一直试图让注册会员ip插入数据库，我目前的代码如下：

$ip = $_SERVER['REMOTE_ADDR'];

if(mysqli_query($con, "INSERT INTO users(name,email,password,ip) VALUES('" . $name . "', '" . $email . "', '" . md5($password) . "', '$ip')")) {
        $successmsg = "Successfully Registered! <a href='login.php'>Click here to Login</a>";
    } else {
        $errormsg = "Error in registering...Please try again later!";
    }

当它插入数据库时​​，它输入一个完全不同的字符串。
Database fields

Structure