(PHP 5 >= 5.3.0, PHP 7)
SplFixedArray::offsetSet — Sets a new value at a specified index
public SplFixedArray::offsetSet ( int $index , mixed $newval ) : void
Sets the value at the specified index to newval.
index
The index being set.
newval
The new value for the index.
No value is returned.
Throws RuntimeException when index is outside the defined size of the array or when index cannot be parsed as an integer.
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https://www.php.net/manual/en/splfixedarray.offsetset.php