Warning: Undefined variable $con in C:\inetpub\apache\agents\1f47f18890635c4d66c8617826c9eabd\index.php on line 23

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in C:\inetpub\apache\agents\1f47f18890635c4d66c8617826c9eabd\index.php:23 Stack trace: #0 C:\inetpub\apache\agents\1f47f18890635c4d66c8617826c9eabd\index.php(23): mysqli_query() #1 {main} thrown in C:\inetpub\apache\agents\1f47f18890635c4d66c8617826c9eabd\index.php on line 23