SplHeap
PHP 手册

SplHeap::top

(PHP 5 >= 5.3.0)

SplHeap::topPeeks at the node from the top of the heap

说明

public mixed SplHeap::top ( void )

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.


SplHeap
PHP 手册