(PHP 5 >= 5.3.0, PHP 7) Rewind iterator back to the start

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

(PHP 5 >= 5.2.0, PHP 7) Sort the entries by value

(PHP 5 >= 5.3.0, PHP 7) Constructs a new empty queue

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

(PHP 5 >= 5.3.0, PHP 7) Return current node index

(PHP 5 >= 5.3.6, PHP 7) Removes all objects except for those contained in another storage from the current

(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