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Iterators

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SPL provides a set of iterators to traverse over objects.

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

Appenditerator Arrayiterator Cachingiterator Callbackfilteriterator Directoryiterator Emptyiterator Filesystemiterator Filteriterator Globiterator Infiniteiterator Iteratoriterator Limititerator Multipleiterator Norewinditerator Parentiterator Recursivearrayiterator Recursivecachingiterator Recursivecallbackfilteriterator Recursivedirectoryiterator Recursivefilteriterator Recursiveiteratoriterator Recursiveregexiterator Recursivetreeiterator Regexiterator

Source: reference/spl/iterators.xml · from the official PHP manual (php/doc-en)