My Craft db.php configuration for AppFog.com

db.php

<?php

/**
 * Database Configuration
 *
 * All of your system's database configuration settings go in here.
 * You can see a list of the default settings in craft/app/etc/config/defaults/db.php
 */

if ($_SERVER['HTTP_HOST'] == 'local.domainname.com') {

	$var_servername = '';
	$var_username = '';
	$var_password = '';
	$var_database = '';
		
} else {
	
	$services_json = json_decode(getenv("VCAP_SERVICES"),true);
	$mysql_config = $services_json["mysql-5.1"][0]["credentials"];
		
	$var_servername = $mysql_config["hostname"];
	$var_username = $mysql_config["username"];
	$var_password = $mysql_config["password"];
	$var_database = $mysql_config["name"];
	
}


return array(

		// The database server name or IP address. Usually this is 'localhost' or '127.0.0.1'.
		'server' => $var_servername,
	
		// The database username to connect with.
		'user' => $var_username,
	
		// The database password to connect with.
		'password' => $var_password,
	
		// The name of the database to select.
		'database' => $var_database,

		// The prefix to use when naming tables. This can be no more than 5 characters.
		'tablePrefix' => 'craft',

);