How you start depends on your editor.
Currently Phpactor has most support when used over it’s own legacy RPC protocol. Phpactor is now primarily a language server, but some additional functionality can still be accessed through the native VIM plugin.
In addition you can also do somethings from the CLI only for that a global installation is recommended.
Select one of the following to get started:
Use the VIM RPC Plugin or set it up as an LSP.
Use Sublime Phpactor Plugin optionally supplement with Sublime LSP:
Use the Emacs RPC client
You should be able to use the Language Server. The procedure should be similar to the ones outlined for other clients. When you get one working, make a pull request to add it here ☺