(PHP 5 >= 5.1.2, PHP 7) Tells if the file is executable

(PHP 5 >= 5.3.0, PHP 7) Return current node pointed by the iterator

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

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

(PHP 5 >= 5.1.0, PHP 7) Returns an iterator for the current entry.

(PHP 5 >= 5.3.0, PHP 7) Checks if an iterator is attached

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

(PHP 5 >= 5.1.0, PHP 7) Rewind the iterator to the specified starting offset

(PHP 5 >= 5.1.2, PHP 7) Gets file permissions

(PHP 5 >= 5.1.0, PHP 7) Get inner iterator