$pageResult = mysqli_query($con, $pageSql);
$count = mysqli_num_rows($pageResult);
if ($count > 0) {
    $paginationCount = DhsHelper::getPagination($count);
}
// ***** Pagination Work End ******
if (isset($_GET['page_id']) && !empty($_GET['page_id'])) {
    $page_id = $_GET['page_id'];
} else {
    $page_id = '0';
}
$pageLimit = PAGE_PER_NO * $page_id;
$sql .= " limit {$pageLimit}," . PAGE_PER_NO;
$result = mysqli_query($con, $sql);
$n = 0;
$categories = DhsHelper::getCategories($con);
while ($row = mysqli_fetch_array($result)) {
    $n++;
    ?>
    <tr class="row<?php 
    echo $row['medicine_id'];
    ?>
">
        <td><?php 
    echo $n;
    ?>
</td>
        <td><?php 
    echo $row['medicine_name'];
    ?>
</td>