On Sun, Sep 7, 2008 at 11:05 AM, Jochem Maas <jochem@xxxxxxxxxxxxx> wrote: > 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); make sure to pass the appropriate mode when instantiating RecursiveIteratorIterator; the default is LEAVES_ONLY, which i presume is not what people want in most cases. here is the list of modes from the spl docs, *mode* Operation mode (one of): - LEAVES_ONLY only show leaves - SELF_FIRST show parents prior to their childs - CHILD_FIRST show all children prior to their parent so, i typically use SELF_FIRST, and then Jochem's example would become, .. foreach(new RecursiveIteratorIterator($c, RecursiveIteratorIterator::SELF_FIRST) as $item) .. -nathan
