PHP – Core
Interface Traversable
Direct Known Implementers
Iterator, IteratorAggregate, IteratorIterator, Nette\ArrayHash, Nette\ArrayList, Nette\Config\Config, Nette\Database\Selector\TableRow, Nette\Database\Selector\TableSelection, Nette\Finder, Nette\Forms\Rules, Nette\Web\Html, Nette\Web\SessionNamespace, OuterIterator, PDOStatement, RecursiveIterator
Documented at php.net