<?php
$username = "admin";
$password = "geheim";
$hostname = "db-instanz1.ck4g1u8kxd13.eu-central-1.rds.amazonaws.com";
$dbname = "database1";
//connection to database
$dbhandle = mysql_connect($hostname, $username, $password) or die("Unable to connect to MySQL");
echo "Connected to MySQL using username - $username, password - $password, host - $hostname<br>";
$selected = mysql_select_db(„$dbname ,$dbhandle) or die("Unable to connect to MySQL DB - check the database name and try again.");
?>