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    SplPriorityQueue::key

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

    SplPriorityQueue::key — Return current node index

    说明

    public SplPriorityQueue::key(): int

    This function returns the current node index

    参数

    此函数没有参数。

    返回值

    The current node index.

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