FilterIterator::valid
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
FilterIterator::valid — Check whether the current element is valid
说明
警告
本函数还未编写文档，仅有参数列表。
Checks whether the current element is valid.
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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