PHP 5.4 - 'closure $this support'
I see that the new planned features for PHP 5.4 are: traits, array dereferencing, a JsonSerializable interface and something referred to as 'closure $this support'

http://en.wikipedia.org/wiki/Php#Release_history

While the others are either immediately clear (JsonSerialiable, array dereferencing) or i looked up the specifics (traits), I am not sure what 'closure $this support' is.  I have been unsuccessful googling for it or finding anything about it on php.net

Does anyone know what this is supposed to be?

If i had to guess, it would mean something like this:

    $a = 10; $b = 'strrrring';
    //'old' way, PHP 5.3.x
    $myClosure = function($x) use($a,$b)
                 {
                     if (strlen($x) <= $a) return $x;
                     else return $b;
                 };

    //'new' way with closure $this for PHP 5.4
    $myNewClosure = function($x) use($a as $lengthCap,$b as $alternative)
                     {
                         if(strlen($x) <=  $this->lengthCap)) return $x;
                         else 
                         {
                             $this->lengthCap++;  //lengthcap is incremented for next time around
                             return $this->alternative;
                         }
                     };

The significance (even if this example is trivial) being that in the past once the closure is constructed the bound 'use' variables are fixed.  With 'closure $this support' they are more like members you can mess with.

Does this sound correct and/or close and/or reasonable?  Does anyone know what this 'closure $this support' means?
PHP 5.4 - 'closure $this support'
===

I see that the new planned features for PHP 5.4 are: traits, array dereferencing, a JsonSerializable interface and something referred to as 'closure $this support'

http://en.wikipedia.org/wiki/Php#Release_history

While the others are either immediately clear (JsonSerialiable, array dereferencing) or i looked up the specifics (traits), I am not sure what 'closure $this support' is.  I have been unsuccessful googling for it or finding anything about it on php.net

Does anyone know what this is supposed to be?

If i had to guess, it would mean something like this:

    $a = 10; $b = 'strrrring';
    //'old' way, PHP 5.3.x
    $myClosure = function($x) use($a,$b)
                 {
                     if (strlen($x) <= $a) return $x;
                     else return $b;
                 };

    //'new' way with closure $this for PHP 5.4
    $myNewClosure = function($x) use($a as $lengthCap,$b as $alternative)
                     {
                         if(strlen($x) <=  $this->lengthCap)) return $x;
                         else 
                         {
                             $this->lengthCap++;  //lengthcap is incremented for next time around
                             return $this->alternative;
                         }
                     };

The significance (even if this example is trivial) being that in the past once the closure is constructed the bound 'use' variables are fixed.  With 'closure $this support' they are more like members you can mess with.

Does this sound correct and/or close and/or reasonable?  Does anyone know what this 'closure $this support' means?