Veritabanı bağlantısı gerçekleştirilemedi.
Warning: Undefined variable $connection in C:\inetpub\wwwroot\ipy\header.php on line 2

Fatal error: Uncaught Error: Call to a member function query() on null in C:\inetpub\wwwroot\ipy\header.php:2 Stack trace: #0 C:\inetpub\wwwroot\ipy\index.php(8): require() #1 {main} thrown in C:\inetpub\wwwroot\ipy\header.php on line 2