A BussinesObject base class for mongodb with php and a sample inherit class.

Auftrag.php

<?php
require_once 'data/BussinesObject.php';

class Auftrag extends BussinesObject 
{
	public function Auftrag($var, $db)
	{
		parent::BussinesObject($var, $db, constant("AUFTRAG_COLLECTION"));
	}

	public static function Find($selector, $db)
	{
		$result = array();
		foreach (BussinesObject::Find($selector, $db, constant("AUFTRAG_COLLECTION")) as $value) {
			$result[count($result)] = new Auftrag($value, $db);
		}
		return $result;
	}

	public static function CreateNewInstance($db)
	{
		return new Auftrag(BussinesObject::CreateNewInstance($db, constant("AUFTRAG_COLLECTION")));
	}
}
?>

BussinesObject.php

<?php
class BussinesObject implements arrayaccess 
{
	var $collection;
	var $db;
	var $data;
	var $changed = false;

	protected function BussinesObject($var, $db, $collection)
	{
		$this->db = $db;
		$this->collection = $collection;
		if(gettype($var) == 'string')
		{
			$this->construct_id($var);
		}
		else
		{
			$this->construct_data($var);
		}
	}

	private function construct_id($id)
	{
		$this->data = $this->db->selectCollection($this->collection)->findOne(array("_id" => $id));
		if(count($this->data) == 0)
		{
			throw new Exception("BussinesObject not found.", 404);
			
		}
	}

	private function construct_data($data)
	{
		$this->data = $data;
	}

	protected static function Find($selector, $db, $collection)
	{
		$result = array();
		$data = $db->selectCollection($collection)->find($selector);
		foreach ($data as $value) {
			$result[count($result)] = $value;
		}
		return $result;
	}

	protected static function CreateNewInstance($db, $collection)
	{
		$data = $db->selectCollection($collection)->save(array('_id' => uniqid()));
		return $data;
	}

	public function offsetSet($offset, $value) 
	{
        $this->data[$offset] = $value;
        $changed = true;
    }

    public function offsetExists($offset) 
    {
    	return array_key_exists($offset, $data);
    }

    public function offsetUnset($offset) 
    {
    	unset($data[$offset]);
    }

    public function Save()
    {
    	$this->db->selectCollection($this->collection)->save($this->data);
    }

    public function offsetGet($offset) 
    {
    	return $this->data[$offset];
    }

    public function GetJSON()
    {
    	return json_encode($this->data);
    }

    public function Update($update)
    {
    	foreach (json_decode($update, true) as $key => $value) {
    		$this[$key] = $value;
    	}
    }
}
?>