(PHP 5 >= 5.1.0, PHP 7)
NoRewindIterator::valid — Validates the iterator
public NoRewindIterator::valid ( ) : bool
Checks whether the iterator is valid.
This function is currently not documented; only its argument list is available.
This function has no parameters.
Returns true on success or false on failure.
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https://www.php.net/manual/en/norewinditerator.valid.php