Interface Iterator

`extends`	`Traversable`

Iterator extends Traversable
- RecursiveIterator extends Iterator
  - SplFileObject implements RecursiveIterator, SeekableIterator
- SeekableIterator extends Iterator
  - SplFileObject implements RecursiveIterator, SeekableIterator

Methods
`public`	`current(): mixed` Implemented by `SplFileObject::current()`	#
`public`	`next(): void` Implemented by `SplFileObject::next()`	#
`public`	`key(): mixed` Implemented by `SplFileObject::key()`	#
`public`	`valid(): bool` Implemented by `SplFileObject::valid()`	#
`public`	`rewind(): void` Implemented by `SplFileObject::rewind()`	#