SplHeap
PHP 手册

SplHeap::valid

(PHP 5 >= 5.3.0)

SplHeap::validCheck whether the heap contains more nodes

说明

public bool SplHeap::valid ( void )

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.


SplHeap
PHP 手册