The RecursiveIterator interface

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    Introduction

    Classes implementing RecursiveIterator can be used to iterate over iterators recursively.

    Interface synopsis

    interfaceRecursiveIteratorextendsIterator {
    publicgetChildren(): ?RecursiveIterator
    publichasChildren(): bool
    publicIterator::current(): mixed
    publicIterator::key(): mixed
    publicIterator::next(): void
    publicIterator::rewind(): void
    publicIterator::valid(): bool
    }

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