(PHP 5, PHP 7) Check whether the inner iterator has a valid next element

(PHP 5 >= 5.3.0, PHP 7) Checks whether the heap is empty.

(PHP 5, PHP 7) Rewind the DirectoryIterator back to the start

(PHP 5, PHP 7) Check whether the current position is valid

(PHP 5 >= 5.0.0, PHP 7) Create a new iterator from an ArrayObject instance

(PHP 5 >= 5.3.0, PHP 7) Returns whether the requested $index exists

(PHP 5 >= 5.1.2, PHP 7) Gets the inode for the file

(PHP 5 >= 5.1.0, PHP 7) The next() method

(PHP 5, PHP 7) Determine if current DirectoryIterator item can be read

(PHP 5 >= 5.1.0, PHP 7) Check whether the inner iterator's current element has children