Warning: Undefined variable $conn in C:\inetpub\vhosts\halwaniti.com\httpdocs\admin\fun.php on line 73

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in C:\inetpub\vhosts\halwaniti.com\httpdocs\admin\fun.php:73 Stack trace: #0 C:\inetpub\vhosts\halwaniti.com\httpdocs\admin\fun.php(73): mysqli_query() #1 C:\inetpub\vhosts\halwaniti.com\httpdocs\feedback.php(5): A->sel() #2 {main} thrown in C:\inetpub\vhosts\halwaniti.com\httpdocs\admin\fun.php on line 73