How long have you guys been debating this? If it's longer than a day, that it's just a mechanism to help you not get started. Just write it, open the editor and make the first page, then the second and so on. Get the site built so that it works. Don't worry about scalability, you'll need to rewrite it anyway.
Choose rails if the guy who loves rails wants to write the the majority of the app, otherwise write it in php.
It would be best if you two sat together while you wrote the it, that way you can figure out if you can work together, or not.
Choose rails if the guy who loves rails wants to write the the majority of the app, otherwise write it in php.
It would be best if you two sat together while you wrote the it, that way you can figure out if you can work together, or not.