(PHP 5 >= 5.1.0, PHP 7) Move to the next entry

(PHP 5 >= 5.1.2, PHP 7) Return all registered __autoload() functions

(PHP 5 >= 5.1.0, PHP 7) Count elements of an object

(PHP 5 >= 5.3.0, PHP 7) Inserts an element in the heap by sifting it up.

(PHP 5 >= 5.1.0, PHP 7) Return the parent classes of the given class

(PHP 5 >= 5.1.0, PHP 7) Return the interfaces which are implemented by the given class or interface

(PHP 5 >= 5.1.0, PHP 7) Gets information about the file

(PHP 5 >= 5.0.0, PHP 7) Construct a new array object

(PHP 5 >= 5.3.0, PHP 7) Checks whether an object exists in the storage

(PHP 5 >= 5.3.0, PHP 7) Removes objects contained in another storage from the current storage