我将表单中的数据发布到此逻辑以注册用户。我的问题是，如何在这个逻辑中将发布到$userpw变量的信息传递给令牌，然后将令牌内容作为用户密码插入db。我对php很陌生，请对我宽容一点。我是不是应该把insert语句改成包含token变量而不是userpw变量？

//---sanitize function on a different file.
require 'sanitize.php';

//-------------variables including the hashed token--------------
  $userid   = $username= $userpw = $userfname = $userlname = '';
  $salt     = "qm&h*";
  $pepper   = "pg!@";
  $token    = hash('ripemd128', "$salt$userpw$pepper");

//--------existing insert logic-------------
if (isset($_POST['user_name'])    &&
    isset($_POST['user_pw']) &&
    isset($_POST['user_fname']) &&
    isset($_POST['user_lname']))
  {

    $username      = sanitizeString($_POST['user_name']);
    $userpw        = sanitizeString($_POST['user_pw']);
    $userfname     = sanitizeString($_POST['user_fname']);
    $userlname     = sanitizeString($_POST['user_lname']);
    $query    = "INSERT INTO users (user_name, user_pw, user_fname, user_lname) VALUES" .
      "('$username', '$userpw', '$userfname', '$userlname')";
         $result   = $conn->query($query);

    if (!$result) echo "INSERT failed: $query<br>" .
      $conn->error . "<br><br>";