If you're talking about setting up a working environment on your own PC that you will later upload changes to the production environment (a.k.a. your work's webserver), I would highly recommend you match each piece of software involved version for version.
In other words, if your work is using an old Apache 1.3.x web server, don't install Apache 2.2 on your computer to test with (unless you're in the process of convincing them to upgrade :p).