(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, 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) End children public

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

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