PHP/HTML Previewer
You can't preview PHP without a server. Well… you can install just PHP, run it from the command line piping it into a .html file and viewing that, but even then you need a mysql server, the extensions etc. I suggest you do install a server on your localhost and restrict access so it can only be accessed from your own computer.
As for HTML simply install a WYSIWYG editor such as Dreamweaver, maybe HTML-Kit (not sure). Or just use any old editor and have the same html file open in a browser and hit refresh.
The servers (if you choose to install them) aren't big, and they are free. For me they total 145mb once installed, but a lot of that is information in the db which I included in the count. That's nothing compared to what you'll have in the public folder, atm (on a private server) I have 283mb.
Did that help you in the slightest?
Well its pretty simple if you have Mozilla firefox installed and you make it your default browser, then everytime you make a html/htm file then there is a firefox logo as whatever you saved it as meaning you open it in Firefox. But for PHP I just upload it to a sub domain, use i love hbh. keep up the good work!.com or any good Subdomain