迭代器

SPL Iterators Class Tree

• ArrayIterator
  • RecursiveArrayIterator
• EmptyIterator
• IteratorIterator
  • AppendIterator
  • CachingIterator
    • RecursiveCachingIterator
  • FilterIterator
    • CallbackFilterIterator
      • RecursiveCallbackFilterIterator
    • RecursiveFilterIterator
      • ParentIterator
    • RegexIterator
      • RecursiveRegexIterator
  • InfiniteIterator
  • LimitIterator
  • NoRewindIterator
• MultipleIterator
• RecursiveIteratorIterator
  • RecursiveTreeIterator
• DirectoryIterator (extends SplFileInfo)
  • FilesystemIterator
    • GlobIterator
    • RecursiveDirectoryIterator