What is more popular asp or php?

When you decide to make the move to developing dynamic web sites you are faced with a decision, should I learn asp or php? There are arguments for both that can are argued out across the Internet.

Wouldn't it be cool if knew what was searched for more asp or php, to suggest what's more popular, well you can.

What is searched for most asp or php

So what are you going to learn? Or if you already write dynamic sites what do you use or prefer? Let us know by leaving comments on this post.