(PHP 5 >= 5.3.0, PHP 7) Constructs a new stack implemented using a doubly linked list

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

(PHP 5 >= 5.3.0, PHP 7) Return current node pointed by the iterator

(PHP 5 >= 5.1.2, PHP 7) Construct a new temporary file object

(PHP 5, PHP 7) Rewind the iterator to the first element of the top level inner iterator

(PHP 5, PHP 7) The current active sub iterator

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

(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) Constructs a new fixed array