(PHP 5 >= 5.1.0)
RecursiveCachingIterator::__construct — Construct
$iterator
   [, string $flags = self::CALL_TOSTRING
  ] )
   Constructs a new RecursiveCachingIterator,
   which consists of a passed in iterator.
  
This function is currently not documented; only its argument list is available.
iteratorThe iterator being used.
flags
       The flags. Use CALL_TOSTRING to call 
       RecursiveCachingIterator::__toString() for every element (the default),
       and/or CATCH_GET_CHILD to catch exceptions when trying to get children.