<option value=" ">Select Time...</option>
            <?php 
    $total_time_slot = $obj_view->select_total_time_slot($shift_id);
    $total_slot_array = array();
    while ($row = mysql_fetch_assoc($total_time_slot)) {
        $total_slot_array[] = $row['time_slot_id'];
    }
    $doctor_id_by_sess = $_SESSION['doctor_id'];
    $appointment_date_by_sess = $_SESSION['user_date'];
    $total_use_time_slot = $obj_view->select_use_time_slot($shift_id, $doctor_id_by_sess, $appointment_date_by_sess);
    $total_use_slot_array = array();
    while ($row1 = mysql_fetch_assoc($total_use_time_slot)) {
        $total_use_slot_array[] = $row1['time_slot_id'];
    }
    $available_time_slot = array_diff($total_slot_array, $total_use_slot_array);
    $remaining_time_slot = $obj_view->remaining_time_slot($available_time_slot);
    foreach ($remaining_time_slot as $time_slot) {
        ?>
                <option value="<?php 
        echo $time_slot['time_slot_id'];
        ?>
"><?php 
        echo $time_slot['time_slot_time'];
        ?>
</option>
                <?php 
    }
    ?>
        </select>
    </td>
    <?php