Considering PHP is more-or-less designed to be a templating language, I'd say it is. Partly.
On the other hand, PHP is a pretty good templating language. People should just learn to separate business logic from presentation logic.
That wasn't how the language was originally intended to be written, and that is not how hordes of people use it. But it can be done. Really.
This is very different from other languages such as ruby where templating uses the ERB module, which is a subset of the ruby language.