(PHP 5 >= 5.4.0, PHP 7) Calculate a unique identifier for the contained objects

(PHP 5 >= 5.1.2, PHP 7) Unregister given function as __autoload() implementation

(PHP 5 >= 5.3.0, PHP 7) Rewinds all attached iterator instances

(PHP 5 >= 5.3.0, PHP 7) Sets the value at the specified $index to $newval

(PHP 5 >= 5.3.0, PHP 7) Constructs a new empty heap

(PHP 5 >= 5.3.0, PHP 7) Peeks at the node from the end of the doubly linked list

(PHP 5 >= 5.3.0, PHP 7) Peeks at the node from the top of the queue

(PHP 5 >= 5.1.0, PHP 7) Returns an iterator for the current entry if it is an

(PHP 5 >= 5.4.0, PHP 7) Create a filtered iterator from another iterator

(PHP 5 >= 5.5.0, PHP 7) Add/insert a new value at the specified index