SplHeap::top

(PHP 5 >= 5.3.0, PHP 7)

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

说明

public SplHeap::top ( void ) : 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.