Please state the minimum required PHP version

[asmfreak]

I can confirm grocy does not work with PHP 7.0 because of some dependencies, namely Tuupola\Middleware\CorsMiddleware which requires at least 7.1 see ( this comment )

[berrnd]

Right, we also had this in #8 and #53.

It's stated in README that currently everything is only tested against PHP 7.2:
https://github.com/grocy/grocy#how-to-install

I personally don't see a problem with this and don't want to "optimize" anything by not using never PHP features - having multiple versions of PHP on the same machine is not a real problem, when needed, in my opinion. Also I would say the larger number of users are running grocy with grocy-docker (me not included), which uses PHP 7.2 anyway...