SplHeap::extract

(PHP 5 >= 5.3.0, PHP 7)

SplHeap::extract — Extracts a node from top of the heap and sift up.

说明

public mixed SplHeap::extract ( void )

参数

此函数没有参数。

返回值

The value of the extracted node.

错误／异常

Throws RuntimeException when the data-structure is empty.