(PHP 5 >= 5.1.0, PHP 7) Get current element

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

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

(PHP 5, PHP 7) Determine if current DirectoryIterator item is a regular file

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

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

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

(PHP 5 >= 5.0.0, PHP 7) Rewind array back to the start

(PHP 5 >= 5.2.0, PHP 7) Sort an array using a case insensitive "natural order" algorithm

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