Warning: Undefined variable $sql_gs in C:\xampp\htdocs\modules\drop_m.php on line 7

Fatal error: Uncaught Error: Call to a member function existsTable() on null in C:\xampp\htdocs\modules\drop_m.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\modules\drop_m.php on line 7