SplHeap::extract

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

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

說明

public SplHeap::extract(): mixed

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

The value of the extracted node.

錯誤／異常

Throws RuntimeException when the data-structure is empty.