Re: [PHP] Recursive Iteration over a collection of objects

David Lidstone schreef:
> Hi
>
> I am getting myself quite confused while trying to use SPL to
> recursively iterate through a collection of objects, and any help would
> be greatly appreciated!
>
> My collection of objects is contained in a class (which I frequently use
> to iterate through objects stored in an array in the class), and I think
> my hasChildren() and getChildren() methods are working ok, but I am
> unable to make it recursive.
>
> I am particularly confused by where I have to use
> RecursiveIteratorIterator (do I have to at all?),

something like:

$c = new Categories;
$c->loadAll();

foreach (new RecursiveIteratorIterator($c) as $item)
var_dump($item);

> and the getIterator()
> method (again, do I need it and why?). Am I going about this totally the
> wrong way to start with?
>
> I have tried to summarise my code below. Sorry for the long post, and
> thanks again.
>
> David
>
>
> ====== Script... ==========
>
> $categories = new RecursiveIteratorIterator(new Categories);
> $categories->loadAll();
>
> foreach ($categories as $category) {
> echo 'ID: ' . $category->getID();
> echo 'Level: ' . $category->getLevel();
> }
>
>
> ======= classes... =========
>
> abstract class ObjCollection implements RecursiveIterator {
> // class stores objects in an array
> public $objs = array();
> public function current();
> public function hasChildren();
> // etc etc
> }
>
>
> class Categories extends ObjCollection {
> // concrete class which loads the Category objects into
> // the ObjCollection array
> public function loadAll() {// ...load Category classes
> // into parent:: !}
> }
>
>
> class Category {
> private $id;
> private $level
> public function getID() {return $this->id;}
> public function getLevel() {return $this->level;}
> }
>
>
>
>

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