If you're looking for a way to give back to the PHP community, there's plenty of ways - one of which could be writing for PHPFreaks.com.

We have decided to give people the chance to write tutorials and blog posts for PHP Freaks. [...] You'll be writing about things that are of general interest to PHP developers and you will be writing tutorials for people who are learning about PHP at any level (i.e. from beginner tutorials to advanced topics). We would rather have tutorials that teach programming/coding concepts or theory than specific things, such as a blog.

You'll need to request membership and join the "Authors" group to get started. Check out their list of other criteria you'll need to match too.