Post good answers. Don't bother commenting on questions yet as you need 50 rep to comment everywhere.

You also don't *have* to ask questions either, we have many users who primarily answer questions rather than ask them and many users who ask rather than answer.

The key thing is not to force it. Post good answers and get rep.

Your current answers are very high quality, which is awesome, but they are on old questions with good answers already and php is only conditionally on-topic here. I suspect the age and current answers are why your answers didn't get any upvotes.  A problem with php running on your computer is on-topic, actually writing anything *in* php is off-topic as a programming question.

Keep an eye on the [New Questions](http://superuser.com/questions?sort=newest) page, and enjoy your time here.