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Subject: Re: [PHP-DEV]  [RFC] Magic Method that handles unset($object)
From: colder@php.net (Etienne Kneuss)

Hi,

Sebastian Bergmann wrote:
>
>  Is there another solution to this problem (apart from explicitly
>  unsetting the $children array on the $parent object)?And even if there
>  is I think that this method would be usefull.
>   

You could use references, you would have to move some code around, though.
I'm not sure that's exactly what you want, but give it a shot:

   class ParentC {
       public $children = array();

       public function __construct() {
           print "ParentC::__construct()\n";
       }

       public function __destruct() {
           print "ParentC::__destruct()\n";
       }
   }

   class Child {
       public $parentO = null;

       public function __construct() {
           print "Child::__construct()\n";
       }

       public function __destruct() {
           print "Child::__destruct()\n";
       }
   }

   function &setup() {
       $parent = new ParentC;
       $child = new Child;
       $parent->children[] = &$child;
       $child->parentO = &$parent;
       return $parent;
   }


   $parent = &setup();
   $parent = null;

   echo "--end--\n";

Result:

ParentC::__construct()
Child::__construct()
ParentC::__destruct()
Child::__destruct()
--end--

-- 
Etienne Kneuss
http://www.colder.ch
colder@php.net

Men never do evil so completely and cheerfully as 
when they do it from a religious conviction.
-- Pascal