It is, but also note my other points:

1 - security-safe and type-safe from the beginning 2 - none of the additional programming paradigms. PHP wants to be everything in one language. I know you can still use PHP "basics" like that, but it's not going to be easy to find tutorials etc. showing that

The main point I wanted to make was not about the index.php file. In other words, I'd like a PHP3, but a clean, safe, very well-designed one.