Warning: Undefined variable $con in /home5/navamsha/vanipublications.com/bookview.php on line 402

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home5/navamsha/vanipublications.com/bookview.php:402 Stack trace: #0 /home5/navamsha/vanipublications.com/bookview.php(402): mysqli_query(NULL, 'select * from n...') #1 {main} thrown in /home5/navamsha/vanipublications.com/bookview.php on line 402