数据库未使用“编辑用户表单”进行更新

Question

我有一个管理员页面，允许管理员编辑刚刚注册的用户的详细信息。每个人的“访问级别”默认为4，由管理员将其访问级别更改为“2”（对于导师）或“3”（对于学生）。

adminpage.php

T.get('followers/ids', { screen_name: 'kanyewest' },  function (err, data) {
   console.log(data.ids)
});

editUser.php

    <div class="container">
                    <h3> New Members </h3>

                    <?php

                    $query = "Select * FROM users WHERE accessLevel = '4'";

                    $result = mysqli_query($conn, $query);
                    if (mysqli_num_rows($result) > 0) {
                        while ($row = mysqli_fetch_assoc($result)) {
                            $userID = $row['userID'];
                            $firstName = $row['firstName'];
                            $lastName = $row['lastName'];
                            $emailAddress = $row['emailAddress'];
                            $accessLevel = $row['accessLevel']; 

                            echo
                            "<div class = 'row'>
                            <div class='col-sm-12 col-md-6 col-lg-3'>
                            <div class='box'> 
                            <h5> User ID: $userID </h5>
                            <h5> User Name: $firstName $lastName </h5>
                            <p> Email: $emailAddress </p>
                            <p> Access Level: $accessLevel</p>
                            <a href = 'editUser.php?getUser=$userID' name='Edit Details' class = 'button'>Edit Details</a>
                            </div>
                            </div>



                            </div>";
                        }
                    }

最后，updatedProfile.php

    <?php
    include ('connection.php');
    $getID = $_GET['getUser'];
    $query = "Select * From users where userID ='$getID'";
    $return = mysqli_query($conn, $query);
    ?>


 <?php
                include ('connection.php');
                $userQuery = "Select * FROM users WHERE userID = '$getID'";
                $return = (mysqli_query($conn, $userQuery));

                if (mysqli_num_rows($return) > 0) {
                    while ($row = mysqli_fetch_assoc($return)) {

                        $userID = $row['userID'];
                        $firstName = $row['firstName'];
                        $lastName = $row['lastName'];
                        $emailAddress = $row['emailAddress'];
                        $password = $row['password'];
                        $accessLevel = $row['accessLevel'];
                    }

                    echo
                    "<h5> Edit Profile for $firstName $lastName </h5>;

                    <form class ='form' method ='POST' name ='Update' action= 'updatedProfile.php?getid=$getID'>
                    <fieldset>
                    <legend>Update Profile Details</legend>
                    <div class = 'input-group fluid'>
                    <label for = 'userID'>UserID</label>
                    <input type = 'number' value='$userID' id ='userID' placeholder = 'UserID'>
                    </div>
                    <div class = 'input-group fluid'>
                    <label for = 'firstName'>First Name</label>
                    <input type = 'text' value='$firstName' id = 'firstName' placeholder = 'FirstName'>
                    </div>
                    <div class = 'input-group fluid'>
                    <label for = 'lastName'>Last Name</label>
                    <input type = 'text' value = '$lastName' id='lastName' placeholder = 'Last Name'>
                    </div>
                    <div class = 'input-group fluid'>
                    <label for = 'emailAddress'>Email</label>
                    <input type = 'email' value='$emailAddress' id ='emailAddress' placeholder = 'emailAddress'>
                    </div>
                    <div class = 'input-group fluid'>
                    <label for = 'emailAddress'>Password</label>
                    <input type = 'password' value='$password' id ='password' placeholder = 'Password'>
                    </div>
                    <div class = 'input-group fluid'>
                    <label for = 'emailAddress'>Access Level</label>
                    <input type = 'number' value='$accessLevel' id ='accessLevel' placeholder = 'Access Level'>
                    </div>
                    <button>Update Details</button>

                    </fieldset>
                    </form>         
            </div>
        </div>
        </div>
        </div>";
                }
                ?>

                <?php
                include("connection.php");


                if (isset($_POST['userID'])) {
                    $userID = $_POST['userID'];
                } else {
                    $error = true;
                    echo "big error";
                }
                if (isset($_POST['emailAddress'])) {
                    $emailAddress = $_POST['emailAddress'];
                } else {
                    $error = true;
                }
                if (isset($_POST['firstName'])) {
                    $firstName = $_POST['firstName'];
                } else {
                    $error = true;
                }
                if (isset($_POST['lastName'])) {
                    $lastName = $_POST['lastName'];
                } else {
                    $error = true;
                }

                if (isset($_POST['accessLevel'])) {
                    $accessLevel = $_POST['accessLevel'];
                } else {
                    $error = true;
                }

                if (isset($_POST['password'])) {
                    $password = $_POST['password'];
                } else {
                    $error = true;
                }

                if (!$error) {
                    //$update = "UPDATE `rdonaghy08`.`users` SET userID='$userID', `firstName` = '$firstName', `lastName` = '$lastName', `password` = '$password', `accessLevel` = '$accessLevel' WHERE `users`.`userID` = '$getID'";
                    $update = "UPDATE users SET userID='$userID', firstName = '$firstName', lastName = '$lastName', password = '$password', accessLevel = '$accessLevel' WHERE userID = '$getID'";
                    $return = mysqli_query($conn, $update) or die(mysqli_errno($conn));
                }

我知道要查看的代码很多，我真的不认为有人为我这样做，我只是想知道我是否遗漏了一些简单的东西，或者我是否可以指向正确的方向。电子邮件发送正常，只是数据库永远不会更新，具体而言，访问级别永远不会更新，比如从默认的4到3。

任何人都可以提供帮助吗？非常感谢！