ArrayIterator::valid
My need was to create a java-like collection where I could store objects by their DB primary keys while having the standard stack capabilities of adding, retrieving, and removing objects from collection. ArrayObject didn't quite do what I need it to do so I extended it a little.
<?php
class GenericCollection extends ArrayObject{
private $data;
function __construct(){
$this->data = new ArrayObject();
}
function addObject($_id, $_object){
$_thisItem = new CollectionObject($_id, $_object);
$this->data->offSetSet($_id, $_thisItem);
}
function deleteObject($_id){
$this->data->offsetUnset($_id);
}
function getObject($_id){
$_thisObject = $this->data->offSetGet($_id);
return $_thisObject->getObject();
}
function printCollection() {
print_r($this->data);
}
}
class CollectionObject {
private $id;
private $object;
function __construct($_id, $_object){
$this->id = $_id;
$this->object = $_object;
}
function getObject(){
return $this->object;
}
function printObject() {
print_r($this);
}
}
?>
Call it like so:
<?php
$u1 = new User/Data/Object (); //whatever, just an object.
$myCollection = new GenericCollection();
$myCollection->addObject(1, $u1);
print_r($myCollection->getObject(1));
?>
Now you have a simple and functional collection framework. Add methods in for specific types of sorting, we just didn't need anything other than primary key access. And you can add introspection into the collection object if you need to track what kind of an object it is.
tony@tonyandcarol.com
A classe ArrayObject
Introdução
...
Sinopse da classe
ArrayObject
class ArrayObject
implements
IteratorAggregate
,
Traversable
,
ArrayAccess
,
Countable
{
/* Métodos */
__construct
( mixed $input
)
}Índice
- ArrayObject::append — Acrescenta um valor
- ArrayObject::__construct — Constrói um novo objeto array
- ArrayObject::count — Retorna o número de elementos no iterador
- ArrayObject::getIterator — Retorna o iterador do ArrayObject
- ArrayObject::offsetExists — Retorna se o índice solicitado existe ou não
- ArrayObject::offsetGet — Retorna o valor do índice especificado
- ArrayObject::offsetSet — Define o valor do índice especificado por $index para $newval
- ArrayObject::offsetUnset — Destrói o elemento no índice especificado
add a note
User Contributed NotesArrayObject
tony at tonyandcarol dot com
08-Oct-2008 05:49
08-Oct-2008 05:49
dave at csixty4 dot com
05-Sep-2008 06:28
05-Sep-2008 06:28
If you want to use array functions on an ArrayObject, why not use iterator_to_array() to get a standard PHP array? Do your operations on that array, then instantiate a new ArrayObject, passing it the array.
This might be a little slow on large ArrayObjects, but you'd have access to all of the array functions.
Anonymous
10-Aug-2008 04:17
10-Aug-2008 04:17
Too bad the Array functions [1] are not available on this object… otherwise I would be using it all the time.
[1] http://nl.php.net/manual/en/ref.array.php