SplFixedArray::offsetSet Sets a new value at a specified index &reftitle.description; public voidSplFixedArray::offsetSet intindex mixednewval Sets the value at the specified index to newval. &reftitle.parameters; index The index being set. newval The new value for the index. &reftitle.returnvalues; &return.void; &reftitle.errors; Throws RuntimeException when index is outside the defined size of the array or when index cannot be parsed as an integer.