(PHP 5 >= 5.3.0, PHP 7) Attaches iterator information

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

(PHP 5 >= 5.1.0, PHP 7) Checks if the storage contains a specific object

(PHP 5 >= 5.3.0, PHP 7) Returns whether the requested $index exists

(PHP 5 >= 5.1.0, PHP 7) Seeks to a position

(PHP 5 >= 5.1.0, PHP 7) Adds an object in the storage

(PHP 5, PHP 7) Returns whether current entry is a directory and not '.' or '..'

(PHP 5 >= 5.1.0, PHP 7) Create an iterator from anything that is traversable

(PHP 5 >= 5.3.0, PHP 7) Recover from the corrupted state and allow further actions on the heap.

(PHP 5 >= 5.1.0, PHP 7) Sets flags for the SplFileObject