[bakje]

Actually as shown by your output it doesn't completely refuse to divide by zero, a warning means that execution continued.

The result of that division is a float with a value of -INF, INF being a constant that PHP treats as infinite.

But as of PHP 8 dividing by zero causes a fatal error and execution is halted.

This site is really good for comparing results in different PHP versions: https://3v4l.org/9Tl1I

I actually wasn't aware that PHP had an INF contant but seeing the warning in your output prompted me to dig a little bit deeper :)