$hostname = "localhost";
$username = "dstnzhqz_rtps";
$password = "Prasad@810";
$database = "dstnzhqz_rtps";   // import chesina db name
$conn = mysqli_connect($hostname,$username,$password,$database);

<!-- Data Tabled Css  -->
<link rel="stylesheet" href="//cdn.datatables.net/1.12.1/css/jquery.dataTables.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11.4.14/dist/sweetalert2.all.min.js"></script>
    <!-- Fav  -->
    <script src="https://unpkg.com/sweetalert/dist/sweetalert.min.js"></script>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.2.0/jquery.fancybox.min.css" rel="stylesheet" />
    <!-- Style for Dialog Box -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.2.0/jquery.fancybox.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.2.0/jquery.fancybox.min.css">
  
<!-- font awesome icon -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.2/css/all.min.css" integrity="sha512-1sCRPdkRXhBV2PBLUdRb4tMg1w2YPf37qatUFeS7zlBy7jJI8Lf4VHwWfZZfpXtYSLy85pkm9GaYVYMfw5BC1A==" crossorigin="anonymous" referrerpolicy="no-referrer" />
  
  

<br />
<b>Warning</b>:  Undefined variable $conn in <b>/home/dstnzhqz/public_html/includes/config.php</b> on line <b>15</b><br />
<br />
<b>Fatal error</b>:  Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/dstnzhqz/public_html/includes/config.php:15
Stack trace:
#0 /home/dstnzhqz/public_html/includes/config.php(15): mysqli_query()
#1 /home/dstnzhqz/public_html/index.php(6): include('/home/dstnzhqz/...')
#2 {main}
  thrown in <b>/home/dstnzhqz/public_html/includes/config.php</b> on line <b>15</b><br />