Ah, there're some services that provide cli tool, which uses PHP. First step to install that tool is to install php. I don't want a web environment here, just

Ah, there're some services that provide cli tool, which uses PHP. First step to install that tool is to install php. I don't want a web environment here, just a php with version in my system to install that tool, but failed. I don't know how to begin, try and failed. Hopelessly.