(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplFixedArray::offsetUnset — Unsets the value at the specified $index
$index): voidUnsets the value at the specified index.
indexThe index being unset.
沒(méi)有返回值。
Throws RuntimeException when index is outside
the defined size of the array or when index cannot be parsed as an integer.