(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::offsetSet — Sets the value at the specified $index to $value
public SplDoublyLinkedList::offsetSet(?int $index, mixed $value): void
Sets the value at the specified index to value.
index The index being set. If null, the next value will be added after the last item.
value The new value for the index.
No value is returned.
Throws OutOfRangeException when index is out of bounds or when index cannot be parsed as an integer.
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https://www.php.net/manual/en/spldoublylinkedlist.offsetset.php