On Marco Tabini's blog today, there's one of his traditionaly long posts dealing, this time, with "Five things you can do for PHP".
Contributing to PHP is, I think, perhaps simpler than ordering a hot beverage* at Starbucks. It is, for sure, simpler than most people seem to think, and it requires no skills beyond being… a PHP developer (which is, of course, different from being a "developer of PHP").
If you don't believe me, consider this quick lists of things you can to help improve PHP today.
I often hear comments like "I wish I could contribute to PHP… but I really (don't have time|don't have the knowledge|am too shy|insert your favourite meaningless excuse here)".
Items in the list include: "File a bug", "Learn more about what PHP has to offer", and "Celebrate those who work on PHP". He talks about these and the other two in the list in detail, giving more information on how you can get involved. You don't have to work on the PHP core to contribute to the project - all you need to do is have a will to help and a little bit of time...