extend php classes like in javascript

php extender class

<?php

class ExtendClass 
{

	public function __call($name,$args)
	{
		if(isset($this->$name) && is_callable($this->$name))
			return call_user_func_array($this->$name, $args);
		else
			throw new Exception("Method: " . $name . " doenst exist.");
	}

	public function __invoke($functions)
	{
		foreach ($functions as $name => $func) 
		{
			$this->$name = $func;
		}
	}

    public function __set($name, $value)
    {
        $this->$name = $value;
    }

    public function __get($name)
    {
    	if(isset($this->$name))
    		return $this->$name;
    	else
    		throw new Exception("Property does not exist or is private/protected");
    }
}

class Test extends ExtendClass
{
	public $x = 5;

	public function doSomething() {
		foreach ($this as $value) {
			if(!is_object($value))
			print $value . '<br />';
		}
	}
}

$asd = new Test;
$asd(array(
	'addieren' => function($x) use(&$asd) {
		$asd->x += $x;
		return $asd->x;
	},
	'nummer' => 0,
	'testobj' => new Test,
	'extendtest' => function() use (&$asd) {
		$asd->testobj(array(
			'testfunc' => function() {
				print 'im a test';
			}
		));
	}
));



print $asd->addieren(5);
print  '<br>';
print $asd->addieren(5);
print  '<br>';
print $asd->addieren(5);
print  '<br>';
print $asd->addieren(5);
print  '<br>';
$asd->extendtest();
$asd->testobj->testfunc();

$asd->doSomething();