(PHP 5, PHP 7) Check whether current DirectoryIterator position is a valid file

(PHP 5, PHP 7) Return the key for the current element

(PHP 5 >= 5.3.0, PHP 7) Begin children public

(PHP 5 >= 5.4.0, PHP 7) Returns current regular expression

(PHP 5 >= 5.1.0, PHP 7) Get flags public void

(PHP 5 >= 5.3.0, PHP 7) Gets the registered iterator instances

(PHP 5 >= 5.1.0, PHP 7) Check whether the current element is valid

(PHP 5 >= 5.4.0, PHP 7) Check whether the inner iterator's current element has children

(PHP 5 >= 5.2.2, PHP 7) The number of elements in the iterator

(PHP 5 >= 5.1.0, PHP 7) Construct public