Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in C:\Wamp64\www\xades\facturaembk.php:22 Stack trace: #0 C:\Wamp64\www\xades\facturaembk.php(13): index('', '', '') #1 {main} thrown in C:\Wamp64\www\xades\facturaembk.php on line 22