Echo Checkbox php in table

i have a mysql database , i'm able to select the information from the tables and i'm able to echo the values in a table but i'm not able to add a checkbox under the status column . The error is : unexpected checkbox.

<?php
                ini_set('date.timezone','Asia/Beirut');
                $time = date('H:i', time());

                if(isset($_SESSION["Id"])){
                    $db = mysqli_connect('localhost', 'root', '', 'projetphp');
                    $results = mysqli_query($db,'SELECT FirstName,LastName FROM user,user_has_class,class WHERE user.Id= user_has_class.User_Id AND class.Id= user_has_class.Class_Id AND class.Id = '.$_SESSION['Id'].' ;');

                    $row = mysqli_fetch_array($results);


                    while( $row = $results->fetch_assoc()) {

                    echo "<tr><td>".$row['FirstName']."</td><td>".$row['LastName']."</td><td><input type="checkbox" value=""/></td><tr>";
                    }
                }
            ?>

I want the checkbox under status. This is the site so far