(PHP 5 >= 5.2.0, PHP 7) The offsetExists purpose

(PHP 5 >= 5.3.0, PHP 7) Check validity public

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

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

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

(PHP 5 >= 5.3.0, PHP 7) Counts the number of elements in the queue.

(PHP 5, PHP 7) Determine if current DirectoryIterator item is '.' or '..'

(PHP 5 >= 5.2.0, PHP 7) The offsetGet purpose

(PHP 5 >= 5.1.0, PHP 7) Count elements of an object

(PHP 5 >= 5.2.0, PHP 7) Sets the regular expression flags.