(PHP 5 >= 5.2.0, PHP 7)
CachingIterator::offsetSet — The offsetSet purpose
public CachingIterator::offsetSet ( mixed $index , mixed $newval ) : void
This function is currently not documented; only its argument list is available.
index
The index of the element to be set.
newval
The new value for the index.
No value is returned.
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https://www.php.net/manual/en/cachingiterator.offsetset.php