ArrayObject::STD_PROP_LIST: Properties of the object have their normal functionality when accessed as list (var_dump, foreach, etc.).
ArrayObject::ARRAY_AS_PROPS: Entries can be accessed as properties (read and write).

Changelog

Version	Description
5.3.0	Implements Serializable.

ArrayObject::append — Appends the value
ArrayObject::asort — Sort the entries by value
ArrayObject::__construct — Construct a new array object
ArrayObject::count — Get the number of public properties in the ArrayObject
ArrayObject::exchangeArray — Exchange the array for another one.
ArrayObject::getArrayCopy — Creates a copy of the ArrayObject.
ArrayObject::getFlags — Gets the behavior flags.
ArrayObject::getIterator — Create a new iterator from an ArrayObject instance
ArrayObject::getIteratorClass — Gets the iterator classname for the ArrayObject.
ArrayObject::ksort — Sort the entries by key
ArrayObject::natcasesort — Sort an array using a case insensitive "natural order" algorithm
ArrayObject::natsort — Sort entries using a "natural order" algorithm
ArrayObject::offsetExists — Returns whether the requested index exists
ArrayObject::offsetGet — Returns the value at the specified index
ArrayObject::offsetSet — Sets the value at the specified index to newval
ArrayObject::offsetUnset — Unsets the value at the specified index
ArrayObject::serialize — Serialize an ArrayObject
ArrayObject::setFlags — Sets the behavior flags.
ArrayObject::setIteratorClass — Sets the iterator classname for the ArrayObject.
ArrayObject::uasort — Sort the entries with a user-defined comparison function and maintain key association
ArrayObject::uksort — Sort the entries by keys using a user-defined comparison function
ArrayObject::unserialize — Unserialize an ArrayObject

The ArrayObject class