ArrayObject
ArrayObject is a native class that provides the functionality of an array with the added features of an object. It extends the base ArrayObject class and implements the ArrayAccess, Countable, IteratorAggregate, and Serializable interfaces.
With ArrayObject, it is possible to create objects that have the behavior of arrays, meaning it is possible to access array elements as properties and use object-oriented methods to manipulate the array.
Operators such as append [], or foreach() loops, are then available with those objects.
On the other hand, ArrayObject fails any array type, and many array functions do not work with the objects: array_key_exists(), array_map(), etc.
Converting an ArrayObject to an array is done with a cast (array) or a call to iterator_to_array().
<?php
class myObject extends ArrayObject{ }
$variable = new ArrObj([0, 1]);
$variable[] = 2;
foreach($variable as $k => $v) {
echo $k . ' => ' . $v . PHP_EOL;
}
?>