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    SplDoublyLinkedList::offsetExists

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists

    说明

    public SplDoublyLinkedList::offsetExists(int $index): bool

    参数

    index

    The index being checked.

    返回值

    true if the requested index exists, otherwise false

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