A simple PHP DI Container and Manager

gistfile1.aw

<?php

class Foo
{
    private $name;

    public function __construct($name)
    {
        echo "Foo instantiated";
        $this->name = $name;
    }

    public function say()
    {
        echo "Hello " . $this->name . "\n";
    }
}

class AssetManager
{
    private $assets;

    public function set($name, Asset $asset)
    {
        $this->assets[$name] = $asset;
    }

    public function get($name)
    {
        return isset($this->assets[$name]) ? $this->assets[$name]->get() : null;
    }
}

class Asset
{
    private $params = array();
    private $resource;

    public function __set($key, $value)
    {
        $this->params[$key] = $value;
    }

    public function __get($key)
    {
        return isset($this->params[$key]) ? $this->params[$key] : null;
    }

    public function set(closure $callback)
    {
        $this->resource = $callback;
    }

    public function get()
    {
        $resource = $this->resource;
        return $resource($this);
    }

    public function single(closure $callback)
    {
        return function ($c) use ($callback) {
            static $object;

            if (is_null($object)) {
                $object = $callback($c);
            }

            return $object;
        };
    }
}

$a = new Asset;
$a->name = 'thorpe!';
$a->set($a->single(function($c) {
    return new Foo($c->name);
}));

$am = new AssetManager;
$am->set('foo', $a);

$am->get('foo')->say();
$am->get('foo')->say();