(PHP 5 >= 5.1.0, PHP 7) The valid() method

(PHP 5 >= 5.1.0, PHP 7) Gets the current value

(PHP 5 >= 5.1.0, PHP 7) Return the inner iterator's children as a RecursiveCachingIterator

(PHP 5 >= 5.4.0, PHP 7) Calls the callback with the current value, the current key and the inner iterator

(PHP 5 >= 5.0.0, PHP 7) Check if offset exists

(PHP 5 >= 5.3.0, PHP 7) Rewind iterator public

(PHP 5 >= 5.1.0, PHP 7) Construct a filterIterator

(PHP 5 >= 5.1.0, PHP 7) Rewinds the Iterator

(PHP 5 >= 5.3.0, PHP 7) Gets the flag information

(PHP 5, PHP 7) Move the iterator forward public