(PHP 5, PHP 7) The current active sub iterator

(PHP 5, PHP 7) Get the current depth of the recursive iteration

(PHP 5 >= 5.1.0, PHP 7) Begin children public

(PHP 5, PHP 7) Rewind the iterator to the first element of the top level inner iterator

(PHP 5 >= 5.1.0, PHP 7) End children public

(PHP 5 >= 5.1.0, PHP 7) Has children public

(PHP 5 >= 5.1.0, PHP 7) Next element public

(PHP 5 >= 5.1.0, PHP 7) Begin Iteration public

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

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