Example for Pieter

gistfile1.aw

<?php

/*
    Note, this DIC is quick and dirty, you should use and extend a real DIC
    like Pimple (https://github.com/fabpot/pimple)
*/
class DicContainer implements \ArrayAccess {

    /**
     * @var array contains all DIC items
     */
    private $containerObjects = array();

    public function offsetExists($name) {
        return isset($this->containerObjects[$name]);
    }

    public function offsetGet($name) {
        if (isset($this->containerObjects[$name])) {
            return $this->containerObjects[$name];
        }
        return null;
    }

    public function offsetSet($name, $value) {
        $this->containerObjects[$name] = $value;
    }

    public function offsetUnset($name) {
        unset($this->containerObjects[$name]);
    }

    public function get($name) {
        if ( $this->offsetExists($name) && class_exists($this->offsetGet($name))) {
            $className = $this->offsetGet($name);
            return new $className;
        }
    }
}

class Core_User {

    public function getName() {
        return 'kamme';
    }
}

class Custom_User extends Core_User {
    public function getName() {
        return "Hi, I'm " . parent::getName();
    }
}

$container = new DicContainer();
$container['User'] = 'Custom_User';
/*
    Change the Custom_User to Core_User to see the core functionality.
    You should place this in your config, but can also automate this, see below
*/

echo $container->get('User')->getName();



/* stop here, the code below will break the code above otherwise :) */
__halt_compiler();

/*
    Like I said above, if you want, you can also make it fully automatic by adding something like this.
    I would recomment cacheing this if you use this way!
*/
$coreFiles = glob("Core/*.php");
foreach($coreFiles as $file) {
    $baseName = basename($file, '.php');
    $container[$baseName] = 'Core_' . $baseName;
}

$customFiles = glob("Custom/*.php");
foreach($customFiles as $file) {
    //overwrite core files in $container and add files not in the core
    $baseName = basename($file, '.php');
    $container[$baseName] = 'Core_' . $baseName;
}