SplHeap::valid
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplHeap::valid — Check whether the heap contains more nodes
说明
public SplHeap::valid
(
) : bool
Checks if the heap contains any more nodes.
参数
此函数没有参数。
返回值
Returns true if the heap contains any more nodes, false otherwise.