<?php

class Model {
    private $imager;
    private $config;
    private $connection;
    public function __construct($config, $connection, $url)
    {
        $this->imager    = new Imager($config, $connection);
        $this->config    = $config;
        $this->connection = $connection;
    }

    public function __destruct()
    {
        $this->err      = null;
        $this->imager    = null;
        $this->config    = null;
        $this->result    = null;
        $this->success  = null;
        $this->connection = null;
    }
}

class Community extends Model {
    public getUpdates() { }
    public getNewest() { }
    // und so weiter
}