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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