Введение
    PHP Manual
    PHP Manual»Итераторы»ParentIterator

    Класс ParentIterator

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

    Это расширенный класс от FilterIterator, позволяющий осуществить рекурсивную итерацию, используя класс RecursiveIteratorIterator, который показывает только те элементы, которые имеют потомков.

    class ParentIterator extends RecursiveFilterIterator {
    /* Методы */
    public function __construct(RecursiveIterator $iterator)
    public function accept(): bool
    public function getChildren(): ParentIterator
    public function hasChildren(): bool
    public function next(): void
    public function rewind(): void
    /* Наследуемые методы */
    public function RecursiveFilterIterator::getChildren(): ?RecursiveFilterIterator
    public function RecursiveFilterIterator::hasChildren(): bool
    public function FilterIterator::accept(): bool
    public function FilterIterator::current(): mixed
    public function FilterIterator::key(): mixed
    public function FilterIterator::next(): void
    public function FilterIterator::rewind(): void
    public function FilterIterator::valid(): bool
    public function IteratorIterator::current(): mixed
    public function IteratorIterator::getInnerIterator(): ?Iterator
    public function IteratorIterator::key(): mixed
    public function IteratorIterator::next(): void
    public function IteratorIterator::rewind(): void
    public function IteratorIterator::valid(): bool
    }

    Содержание

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