FilterIterator::valid

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

    FilterIterator::valid — Check whether the current element is valid

    说明

    publicFilterIterator::valid(): bool

    Checks whether the current element is valid.

    注意:

    The standard implementation of this function will initially return false until the inner iterator is advanced to the first accepted element.

    参数

    此函数没有参数。

    返回值

    true if the current element is valid, otherwise false

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