EmptyIterator::valid

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

EmptyIterator::valid — Checks whether the current element is valid

public EmptyIterator::valid(): false

Checks whether the current element is valid.

注意:
The EmptyIterator is always empty and will never have a valid value. The return value is always false.

此函数没有参数。

false