This is the classic look that I have associated with PHP. The type of code doesn't use exactly the same form as regular html.

Seems like Wordpress would have moved onto one of the other open source content management systems by now. Drupal, etc. When I open a page in my blog to view the source code I see typical html and scripts running. I don't see the stylized PHP formatting symbols. So you're apparently talking about something in the back end that I'm not seeing. And I'm not really interested in digging deeper, but it's good to be aware of what software may be in use.