Koneksi Database Gagal!:SQLSTATE[HY000] [2002] No connection could be made because the target machine actively refused it
Warning: Undefined variable $pdo in C:\xampp\htdocs\survey\index.php on line 16

Fatal error: Uncaught Error: Call to a member function query() on null in C:\xampp\htdocs\survey\index.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\survey\index.php on line 16