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

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

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

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

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

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

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

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

(PHP 5, PHP 7) Move forward to the next element

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