(PHP 5, PHP 7) Return the string representation of the current element

(PHP 5, PHP 7) Return the current element public

(PHP 5 >= 5.2.0, PHP 7) The setFlags purpose

(PHP 5 >= 5.2.2, PHP 7) The number of elements in the iterator

(PHP 5, PHP 7) Return the key for the current element

(PHP 5, PHP 7) Construct a new CachingIterator object for the iterator.

(PHP 5 >= 5.2.0, PHP 7) Retrieve the contents of the cache

(PHP 5, PHP 7) Check whether the inner iterator has a valid next element

(PHP 5 >= 5.2.0, PHP 7) The offsetUnset purpose

(PHP 5 >= 5.2.0, PHP 7) The offsetSet purpose