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

(PHP 5 >= 5.1.0, PHP 7) Prevents the rewind operation on the inner iterator.

(PHP 5 >= 5.2.2, PHP 7) Serializes the storage

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

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

(PHP 5 >= 5.3.0, PHP 7) Constructs a new fixed array

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

(PHP 5 >= 5.1.2, PHP 7) Gets the inode change time

(PHP 5, PHP 7) Get owner of current DirectoryIterator item

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