Is it possible to add PHP 7.1 to TIO.run? My reasoning is that using undeclared constant is deprecated in PHP 7.2 (and I think it will be removed in PHP 8).
And this feature is really useful for code golfing.
@KonradBorowski Is having both 7.1 and 7.2 worth it?. While 7.1 doesn't show a warning, it still shows a notice... I'd rather add the latest version that still supports barewords once the current version does not.