adminModule

// if user is level 2 or greater
        if($adminLevel > 1) {

        // start query to fetch all users that aren't admins
        $fetchNonAdmins = dbConnect()->prepare("SELECT * FROM users WHERE level < 1");
        $fetchNonAdmins->execute();
        $nonAdmins = $fetchNonAdmins->fetchAll();

        // echo users in table that are not admins
        echo '
        <div class="col-md-4 admin_module">

          <table class="nonAdmins" border="1">
            <tr>
              <td class="table_header">ID</td>
              <td class="table_header">Register Date</td>
              <td class="table_header">Username</td>
              <td class="table_header">Level 1</td>
              <td class="table_header">Level 2</td>
            </tr>
        ';

        // start to fetch users that aren't admins
        foreach($nonAdmins as $row) {

          echo '

          <tr>
            <td class="table_content">' .$row['id']. '</td>
            <td class="table_content">' .$row['register_date']. '</td>
            <td class="table_content">' .$row['username']. '</td>

            <td class="table_content">
            <form method="post" class="table_content_form">
              <button class="btn btn-default" type="submit" name="changeLevel">Change to level 1</button>
              <input type="hidden" name="user_id" value="' .$row['id']. '"/>
              <input type="hidden" name="user_level" value="1"/>
            </form>
            </td>

            <td class="table_content">
            <form method="post" class="table_content_form">
              <button class="btn btn-default" type="submit" name="changeLevel">Change to level 2</button>
              <input type="hidden" name="user_id" value="' .$row['id']. '"/>
              <input type="hidden" name="user_level" value="2"/>
            </form>
            </td>
          </tr>

          ';

        }

        var_dump($_POST['changeLevel_1']);
        var_dump($_POST);

        // if users hits a change level 1/2 button;
        if(isset($_POST['changeLevel'])) {

        // set $username var
        $userid = $_POST['user_id'];
        $newLevel = $_POST['user_level'];

        // update user in that row to level 1 in database
        $updateLevel = dbConnect()->prepare("UPDATE users SET level = :level WHERE id = :id");
        $updateLevel->bindParam(':id', $userid);
        $updateLevel->bindParam(':level', $newLevel);
        $updateLevel->execute();

        // echo success message and redirect
        echo '<p class="success">' .$username. ' has been updated to level ' .$newLevel. '!</p>';
        header('refresh:3;url=index.php');

        }

        /*
        // if user hits Change to level 2 button;
        if(isset($_POST['changeLevel_2'])) {

        // set $username var
        $username = $row['username'];

        // update user in that row to level 2 in database
        $updateLevel_2 = dbConnect()->prepare("UPDATE users SET level = '2' WHERE username = $username");
        $updateLevel_2->execute();

        // echo success message and redirect
        echo '<p class="success">' .$username. ' has been updated to level 2!</p>';
        header('refresh:3;url=index.php');

        }
        */

        echo '
          </table>
        </div>
        ';