http://stackoverflow.com/questions/18114141/full-inheritance

<?php

abstract class Component extends stdCLass implements ArrayAccess, Countable
{
    protected $Decorators   = array();
    protected $Water        = 0;
    protected $SharedProps  = 0;

    public function GetProperties(Component $Child)
    {
        foreach($this as $k => $v)
        {
            $Child->{$k} = &$this->{$k};
        }

        if(!isset($this->datahash))
        {
            $Child->base     = &$this;
            $Child->datahash = spl_object_hash($this);
        }
    }

    public function AddDecorator($func, $args = array())
    {
        if(is_callable($func))
        {
            array_push($this->Decorators, array($func, $args));
        }
        else
        {
            throw new InvalidArgumentException(sprintf('%s::AddDecorator(callable $func, array $args): Invalid function ( %s ).', get_class($this), var_export($func, true)));
        }
    }

    public function RemoveDecorator($func, $args = array())
    {
        foreach($this->Decorators as & $decorator)
        {
            if($decorator === array($func, $args))
            {
                unset($decorator);
                return true;
            }
        }

        return false;
    }

    public function Decorate()
    {
        foreach($this->Decorators as $call)
        {
            call_user_func_array($call[0], $call[1]);
        }
    }

    public function __call($Key, $Params)
    {
        $prev = debug_backtrace();
        $Key  = (string)$Key;
        $base = isset($this->base)
            ? $this->base
            : $this
        ;

        if(!isset($this->{$Key}) && !isset($base->{$Key}))
        {
            throw new BadMethodCallException(sprintf('Call to undefined method `%s::%s()`', get_class($this), $Key));
            return;
        }

        if(is_callable($this->{$Key}))
        {
            return call_user_func_array($this->{$Key}, $Params);
        }
        elseif(is_callable($base->{$Key}))
        {
            return call_user_func_array($base->{$Key}, $Params);
        }
        else
        {
            throw new BadMethodCallException(sprintf('Call to undefined method `%s::{%s}()`.', get_class($this), var_export($this->{$Key}, true)));
            return;
        }

    }

    private function getHash()
    {
        return isset($this->datahash)
            ? $this->datahash
            : $this->datahash = spl_object_hash($this)
        ;
    }

    public function offsetSet($offset, $value)
    {
        static $count = 0;

        $hash = $this->getHash();

        if (is_null($offset))
        {
            $this->{$hash.$count++} = $value;
            $this->SharedProps++;
        }
        else
        {
            if(!isset($this[$offset])) $this->SharedProps++;

            $this->{$hash.$offset} = $value;
        }
    }

    public function offsetExists($offset)
    {
        return isset($this->{$this->getHash().$offset});
    }

    public function offsetUnset($offset)
    {
        $hash = $this->getHash();

        if(isset($this->{$hash.$offset})) $this->SharedProps--;

        unset($this->{$hash.$offset});
    }

    public function &offsetGet($offset)
    {
        return $this->{$this->getHash().$offset};
    }

    public function count()
    {
        return count($this->SharedProps);
    }

    protected function nop(){;}

    public function SetFunction($name, $func = 'nop')
    {
        $base = isset($this->base)
            ? $this->base
            : $this
        ;

        $old = isset($base->{$name})
            ? $base->{$name}
            : NULL
        ;

        if(!is_callable(array($this, $func)))
        {
            var_dump($this, $func);

            throw new InvalidArgumentException(sprintf('%s::SetFunction(): Undefined method `%s`', get_class($this), var_export($func, true)));
        }

        $this->{$name} = $base->{$name} = array($this, $func);

        return $old;
    }

    // Note Uses shared version of water and can cause notices
    function PourWater()
    {
        printf('Adding Water: %d%s', $this['Water'], "\n");
    }
}

abstract class Decorator extends Component
{
    public function __construct(Component $Parent)
    {
        $this->parent = &$Parent;

        $Parent->GetProperties($this);
    }

    public function __call($Key, $Params)
    {
        $prev   = debug_backtrace();
        $prev   = $prev[0]['class'];

        if($prev == __CLASS__)
        {
            if(!is_callable(array($this->parent, $Key)))
            {
                throw new BadMethodCallException(sprintf('Call to undefined method `%s::%s()`', get_class($this), $Key));
                return;
            }

            return call_user_func_array(array($this->parent, $Key), $Params);
        }

        parent::__call($Key, $Params);
    }
}

class SimpleCofee extends Component
{
    protected $Name         = 'Cofee';
    protected $Cup          = array();

    public function __construct($Parent = NULL)
    {
        $this->Water         = 150;
        $this->Cup['cofeee'] = 25;

        if($Parent instanceof Component)
        {
            $Parent->GetProperties($this);
        }
        else
        {
            $this['Name']       = $this->Name;
            $this['Water']      = $this->Water;
            $this['Cup']        = $this->Cup;
        }

        $this->SetFunction('Produce', 'doProduce');
        $this->SetFunction('SuperChain', 'doSuperChain');
    }

    public function doProduce()
    {
        printf("Making %s....\n", $this->Name);

        $this->Decorate();

        //.....
        $this->PourWater();
        //......

        printf("Making %s: %s\n", $this['Name'], var_export($this['Cup'], true));
    }

    public function doSuperChain()
    {
        print __CLASS__.'::SuperChain('.var_export(func_get_args(), true).")\n";
    }
}

class SimpleTea extends SimpleCofee
{
    protected $Name         = 'Tea';

    public function __construct($Parent = NULL)
    {
        $this->Water         = 150;
        $this->Cup['tea']    = 25;

        if($Parent instanceof Component)
        {
            $Parent->GetProperties($this);
        }
        else
        {
            $this['Name']       = $this->Name;
            $this['Water']      = $this->Water;
            $this['Cup']        = $this->Cup;
        }

        $this->SetFunction('Produce', 'doProduce');
        $this->SetFunction('SuperChain', 'doSuperChain');
    }

    public function doSuperChain()
    {
        print __CLASS__.'::SuperChain('.var_export(func_get_args(), true).")\n";

        parent::doSuperChain(__CLASS__);
    }
}


class SugarCube extends Decorator
{
    public function __construct(Component $Parent)
    {
        parent::__construct($Parent);

        $Parent->AddDecorator(array($this, 'AddSugar'));

        $this->SetFunction('SuperChain', 'doSuperChain');
    }

    public function AddSugar()
    {
        $this['Cup']['Spoon']    = 1;
        $this['Ammount']         = @$this['Ammount'] + 1;
        $this['Water']          -= 10;

        printf('Adding sugar: %d%s', 1, "\n");
    }

    public function doSuperChain()
    {
        print __CLASS__.'::SuperChain('.var_export(func_get_args(), true).")\n";

        parent::doSuperChain(__CLASS__);
    }
}

class DoubleSugarCube extends SugarCube
{
    protected $old;

    public function __construct(Component $Component)
    {
        parent::__construct($Component);

        $this->old = $this->SetFunction('Produce', 'doProduce');

        $this->SetFunction('SuperChain', 'doSuperChain');
    }

    public function AddSugar()
    {
        // Call parent class then parent object
        $this['Cup']['Spoon']    = 1;
        $this['Ammount']         = @$this['ammount'] + 2;
        $this['Water']          -= 20;

        printf('Adding sugar: %d%s', 2, "\n");
    }

    public function doProduce()
    {
        print "\nI have take over Produce!\n";
        print "But I'm a nice guy so I'll call my parent\n\n";

        // Call parent objects function
        $this->parent->doProduce();
    }

    public function doSuperChain()
    {
        static $count = 0;

        print __CLASS__.'::SuperChain('.var_export(func_get_args(), true).")\n";

        parent::doSuperChain(__CLASS__);
    }
}


$Sugar = 1;
$DoubleSugar = 1;

$Cofee = new SimpleCofee();
$Tea   = new SimpleTea();

$Cofee->Produce();
$Tea->Produce();

print "\n============\n\n";

if($Sugar)
{
    new SugarCube($Cofee);
    $Cofee->Produce();
    new SugarCube($Cofee);
    $Cofee->Produce();
}

if($DoubleSugar)
{
    new DoubleSugarCube($Tea);
    $Tea->Produce();
    new DoubleSugarCube($Tea);
    $Tea->Produce();
}

print "\n============\n\n";

$Tea->SuperChain('test');