MultipleIterator::valid
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
MultipleIterator::valid — Checks the validity of sub iterators
说明
public MultipleIterator::valid(): bool
Checks the validity of sub iterators.
警告
本函数还未编写文档，仅有参数列表。
参数
此函数没有参数。
返回值
Returns true if one or all sub iterators are valid depending on flags,
otherwise false
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