SplHeap::top

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

    SplHeap::top — Peeks at the node from the top of the heap

    说明

    public SplHeap::top(): mixed

    参数

    此函数没有参数。

    返回值

    The value of the node on the top.

    错误／异常

    Throws RuntimeException when the data-structure is empty.

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