Thanks very much to both of you.
This does the trick! I had (stupidly) tried:
foreach ($c as new RecursiveIteratorIterator($item))
which with hindsight is completely illogical! I also wasn't aware of the
constants. Is there a simple tutorial / docs you know of for SPL? I have
tried numerous google searches but the tutorials I have found assume I
already know what I am talking about (big mistake:-) ). Even the PHP
docs are very sparse. A real shame, as the SPL seems fantastic and I
would love to use it more widely.
One other thing... is there a mirror for this list? I'm sure SPL must
have been covered many times before, but every time I try to search, the
server times out.
Thanks once again,
David
Nathan Nobbe wrote:
On Sun, Sep 7, 2008 at 11:05 AM, Jochem Maas <jochem@xxxxxxxxxxxxx
<mailto: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
