Wrapper MongoDB

collection.php

<?php

class UmaCollection extends MongoDB
{
  public function find()
  {
    var_dump($this->collection);
  }
}

index.php

<?php

$setup = new MongoDB();
$setup->connect('mongodn://...', 'geroudo', 'coisas');

include 'collection.php';

mongodb.php

<?php

class MongoDB
{
	protected $connect = null;

	public function connect($server, $db, $collection)
	{
		$connection = new \MongoClient($server);
		$db = $connection->selectDB($db);

		$this->collection = new \MongoCollection($db, $collection);
	}
}