PHP Notice: Undefined variable: db in /home/oYR1Oy/prog.php on line 3 PHP Fatal error: Uncaught Error: Call to a member function prepare() on null in /home/oYR1Oy/prog.php:3 Stack trace: #0 {main} thrown in /home/oYR1Oy/prog.php on line 3 hocam $db yi içeren php dosyasını sayfaya include etmelisin