This is just a quick update to SVGGraph, fixing a whole load of warning messages that appear when you use PHP 8.1 with SVGGraph. The warnings are almost all about things that will break in PHP 9 (whenever that is going to arrive) but that work fine at the moment.
Of course, the warning messages themselves break things quite horribly, so most of the changes in this version are adding short attributes that mean "I know this is going to break in PHP 9, I'll fix it then." The reason I didn't fix all of these things properly now is that it would require PHP 8.x - and I'd like to at least keep PHP 7.x supported for now.
The updated version is available from the downloads page or from GitHub, etc.