I have been researching online but can't really figure out the best way to integrate a less or sass compiler into a zend 2 environment.
I have visited few pages but it is not clear step by step.
I am not aware of which package to download and how to make it useful.
Can anyone help please?
Are you sure you need a real integration?
These days, I just use something like gulp to compile/concat/minify front-end assets and dump them into my webroot.
In a typical ZF2 project, you'd end up with a structure like:
MyProject/ MyProject/src MyProject/view MyProject/public/css MyProject/public/js MyProject/frontend/sass MyProject/frontend/js MyProject/bower_components
src, view and public are your typical top-level directories.
frontend holds your sources, which gulp processes, dropping artifacts like
bower_components assumes you're using bower to manage frontend dependencies.
None of the above really cares that it's associated with a ZF2 project; it's completely orthogonal, but lives along side the PHP stuff in your VCS repository.