mongo_helper.php

<?php

class MongoHelper
{
	private static $servers = array();
	
	public static function addServer($name, $host, $port = 27017)
	{
		self::$servers[$name] = "mongodb://{$host}:{$port}";
	}
	
	public static function load($name, $db = false)
	{
		if (isset(self::$servers[$name]))
		{
			if ($db === false)
			{
				return new Mongo(self::$servers[$name]);
			}
			else
			{
				$m = new Mongo(self::$servers[$name]);
				return $m->$db;
			}			
		}
		else
		{
			throw new Exception("Mongo server {$name} not found!");
			return false;
		}
	}
}