©
                    本文档使用
                    php中文网手册 发布
                
(PHP 5)
This object supports cached iteration over another iterator.
$iterator 
   [,  int $flags  = self::CALL_TOSTRING 
  ] )$index 
   )$index 
   )$index 
   ,  string $newval 
   )$index 
   )$flags 
   )CachingIterator::CALL_TOSTRING  Convert every element to string.
CachingIterator::CATCH_GET_CHILD  Don't throw exception in accessing children.
CachingIterator::TOSTRING_USE_KEY  Use key for conversion to string.
CachingIterator::TOSTRING_USE_CURRENT  Use current for conversion to string.
CachingIterator::TOSTRING_USE_INNER  Use inner for conversion to string.
CachingIterator::FULL_CACHE  Cache all read data.