在PHP中获取所有数据时隐藏列

everyone, I want to list all users data from the database in PHP. there will be a user is logged-in at a single time. I want un-fetch or hide a single row who has active(logged-in). so, I'm asking you how can I do this...

$query=$conn->pdo->exec("SELECT * FROM usertable");   
$row=$query->fetch();

<thead>
    <tr>
        <th>User Name</th>
        <th>Name</th>
        <th>Email</th>
        <th>Role</th>
        <th>Post</th>
        <th>Action</th>
    </tr>
</thead>
<tbody>
    <?php while($row=$query->fetch()){ ?>
    <tr>
        <td><?php echo $row['username']; ?>
        </td>
        <td><?php echo ucfirst($row['name']); ?>
        </td>
        <td><?php echo $row['username']; ?></td>
        <td><?php echo ucfirst($row['user_type']); ?></td>
        <td><?php echo $row['id']; ?></td>
    </tr>
</tbody>

You can add new field in your usertable like logged with default value 0.when user login you should change 0 to 1.Now you change your sql query **select * from usertable where logged='0';**

You need to add condition in your query like below:

$query=$conn->pdo->exec("SELECT * FROM usertable WHERE <column name> != <active value>");

Note: Change column name and it's corresponding value to skip those rows