Well, yes, although running them locally is not what I was referring to. I was just saying that you can edit them on your computer, and then upload them to the server. Then you can view the results online and don't have to worry about having PHP on your own computer. That's the way I tend to work.
Of course, if you want to build and test the website on your own computer before uploading anything to the web, that's also easy to do. You can download a free testing environment and use that on your computer. There is XAMPP for Mac and PC, or WAMP for PC and MAMP for Mac. They make life very easy. I use MAMP.
But in your case, I wouldn't complicate things like this. Just test the blog online as your build it.
Sorry if that doesn't make sense. Feel free to ask questions.