Work with 7zip archive format

[AnriKoVa]

Hi, thanks for very nice, useful package.
I try to implement creating achives .7z and .7zip from files, add this extentions too - gemorroj/archive7z, but get the next error:

Could not create archive: Binary of 7-zip is not available

I saw in you docs that need use "Uses system binary 7z to work". I try convert files that need archive to binary but this not help, not good understand how it use.
Can a bit clarify where I made a mistake, or some example how to work with create .7z and .7zip archive?
Thank a lot.

[wapmorgan]

readme of Gemorroj/Archive7z says:

PHP >= 7.1.3
shell
7-zip >= 7.30 (p7zip >= 9.38)

So you need to install 7-zip package in your OS