(PHP 5 >= 5.1.0, PHP 7) Rewind the iterator to the first storage element

(PHP 5 >= 5.1.2, PHP 7) Tells if the object references a regular file

(PHP 5 >= 5.1.0, PHP 7) Sets the behavior flags.

(PHP 5 >= 5.3.0, PHP 7) Associates data to an object in the storage

(PHP 5 >= 5.1.2, PHP 7) Gets an SplFileInfo object for the file

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

(PHP 5 >= 5.3.0, PHP 7) Checks whether the queue is empty.

(PHP 5 >= 5.1.2, PHP 7) Gets the filename

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

(PHP 5 >= 5.3.0, PHP 7) Move to the next node