(PHP 5 >= 5.1.0, PHP 7) Flushes the output to the file

(PHP 5, PHP 7) Determine the type of the current DirectoryIterator item

(PHP 5 >= 5.3.0, PHP 7) Dequeues a node from the queue

(PHP 5, PHP 7) Construct a new CachingIterator object for the iterator.

(PHP 5 >= 5.2.0, PHP 7) User defined sort

(PHP 5 >= 5.3.0, PHP 7) Constructs a new filesystem iterator

(PHP 5 >= 5.1.0, PHP 7) Alias of

(PHP 5 >= 5.0.0, PHP 7) Unsets the value at the specified index

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

(PHP 5 >= 5.1.0, PHP 7) Detach an observer