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

(PHP 5 >= 5.3.0, PHP 7) Retrieve the key for the current file

(PHP 5 >= 5.4.0, PHP 7) Unserializes the storage

(PHP 5 >= 5.3.0, PHP 7) Check whether the queue contains more nodes

(PHP 5 >= 5.1.0, PHP 7) Call a function for every element in an iterator

(PHP 5, PHP 7) Return the string representation of the current element

(PHP 5 >= 5.1.0, PHP 7) Gets the iterator classname for the ArrayObject.

(PHP 5 >= 5.1.2, PHP 7) Gets the file group

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

(PHP 5, PHP 7) Return available SPL classes array