AnObj.php

<?php

/**
 * PHP Anonymous Object
 */
class AnObj
{
	protected $methods = array();

	public function __construct(array $options)
	{
		$this->methods = $options;
	}

	public function __call($name, $arguments)
	{
		$callable = null;
		if (array_key_exists($name, $this->methods))
			$callable = $this->methods[$name];
		elseif(isset($this->$name))
			$callable = $this->$name;

		if (!is_callable($callable))
			throw new BadMethodCallException("Method {$name} does not exists");

		return call_user_func_array($callable, $arguments);
	}
}

// USAGE

// define by passing in constructor
$anonim_obj = new AnObj(array(
	"foo" => function() { echo "foo \n"; }, 
	"bar" => function($bar) { echo $bar; } 
));

$anonim_obj->foo();
$anonim_obj->bar("hello, world \n");

// define at runtime
$anonim_obj->zoo = function() { echo "zoo \n"; };
$anonim_obj->zoo();

// mimic self 
$anonim_obj->prop = "property \n";
$anonim_obj->propMethod = function() use($anonim_obj) { echo $anonim_obj->prop; };
$anonim_obj->propMethod();