Is it best practice to always capitalize class file names in PHP, and other languages?

Question

I ask because I've seen a couple of OO PHP tutorials which do not adhere to this, but to me it just makes sense. It makes it easy to instantly see if a file is a class or not, if non-class files all use lowercase names.

Answer 1

This is a naming convention question and whilst it is a good meta question it seems to have been well covered with this stackoverflow question from Dec 2008:

http://stackoverflow.com/questions/332831/best-practices-for-naming-conventions

basically some languages have prescribed naming conventions e.g. Java whereas others (the majority) have evolved and are mixed to the point of Programmer's Holy Wars.

Answer 2

My 2c:

If the language doesn't force any conventions, and this includes things like indentation (not just naming). Then the important thing is consistency. Consistency is far more important than the choice of a good convention.

The existing answer answers your actual question.