@codefreak As @thomaskim says, just compile assets locally and then upload the generated files. It’s what I do for clients who are stuck using shared hosts with no SSH access, or ability to install command line utilities to run things like Gulp and Grunt.
Sometimes I stuck on some quick and dirty fixes on direct on client server. At that time I don't have all the Gulp and Grunt set-up. So for that reason I want some PHP based solutions, So I can use that on my local development as well as on server.