(PHP 5 >= 5.1.0, PHP 7) Create a RecursiveFilterIterator from a RecursiveIterator

(PHP 5 >= 5.3.0, PHP 7) Unserialize an ArrayObject

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

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

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

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

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

(PHP 5 >= 5.4.0, PHP 7) Calls the callback with the current value, the current key and the inner iterator

(PHP 5 >= 5.1.0, PHP 7) Truncates the file to a given length

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