<?php
class a{
  public $c = array();
  function __call($name, $args){
    $closure = $this->c[$name]; // example
    $self = $this;
    // how can I pass $self to closure?
    $closure->static['self'] = $this // NO!, Reflection is giving empty array
    call_user_func_array($closure, $args);
  }
}
$a = new a();
$a->c['hello'] = function($x) use ($self){
  return 'Hello, '.$x.'! My name is '.get_class($self).'!';
};
$a->hello('php');

Please, let Closure be standard object without any restrictions.
Let developers decide what they can use, and what must not.
PHP is already full enough of "RESERVED" "YOU MUST NOT" "YOU CAN NOT" "YOU SHOULD 
NOT" "ITS HARD, SO WE WILL NOT MAKE THIS FEATURE" "I DONT NEED THIS, SO PLEASE 
DON'T REQUEST THIS FEATURE"

In fact, closure is a class: Closure just an implementation detail.

we should forget about the class itself. the output static is just 
let you to ease debugging but not for public access

As reeze pointed out this is only debugging output (var_dump is a debugging function). The property does not actually exist. We provide the same kind of functionality for various other classes. You could think of this as a "private" property, which is used internally, but which the user does not have access too (encapsulation).

I see no reason to expose this. If you need this for $this bindings, then switch to PHP 5.4. It will automatically bind $this and allows rebinding using the ->bind() method.

Closing this as won't fix. (If you have any convincing counter arguments, please share them and this will be reopened.)