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Longhorn PHP 2026 - Call For Papers

    The OuterIterator interface

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

    Introduction

    Classes implementing OuterIterator can be used to iterate over iterators.

    Interface synopsis

    interface OuterIterator extends Iterator {
    /* Methods */
    public function getInnerIterator(): ?Iterator
    /* Inherited methods */
    public function Iterator::current(): mixed
    public function Iterator::key(): mixed
    public function Iterator::next(): void
    public function Iterator::rewind(): void
    public function Iterator::valid(): bool
    }

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