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

(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) End children public

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

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

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

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

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