Iterator::key
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    PHP Manual»Iterator»Iterator::key

    Iterator::key

    (PHP 5, PHP 7, PHP 8)

    Iterator::key — Return the key of the current element

    Опис

    public function Iterator::key(): mixed

    Returns the key of the current element.

    Параметри

    У цієї функції немає параметрів.

    Значення, що повертаються

    Returns scalar on success, or null on failure.

    Помилки/виключення

    Issues E_NOTICE on failure.

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