IteratorIterator::valid

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

    IteratorIterator::valid — Checks if the current element is valid

    说明

    public IteratorIterator::valid(): bool

    Checks whether the current element is valid.

    参数

    此函数没有参数。

    返回值

    Returns true if the current element is valid, otherwise false

    参见

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    mike at eastghost dot com
    6 years ago
    An Iterator is "valid" when it has additional elements, beyond its element index.

    Said another way: After an Iterator is next()'d to its final element, the Iterator is no longer "valid".

    Said another way: A "hasNext" check would simply return ::valid()
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