On "Output directory" screen create a new server database connection. Copy existing code from there to a new file named config.php. Save it in the root folder of your app on the web server.
Here is a sample contents:
<?php
$host="localhost";
$user="root";
$pwd="";
$port="";
$sys_dbname="livedemo_northwind";
?>
Then add the following to that server database connection at the end:
if(file_exists('config.php'))
include 'config.php';
This is how it supposed to look: