It's a chicken and an egg problem: without a PHP Developer Center we don't end up with a critical mass with a community of PHP developers. One of the objectives behind launching the center is that we now have a Yahoo PHP community specifically to help developers who are coding in PHP and utilizing Yahoo Web Services.

Ultimately it is our objective to provide a language-specific development center for every language that matters. It's just a matter of which ones we get to first.

It basically tells developers that if you are coding in PHP, you are welcome and we would love to have you write applications that integrate with Yahoo.