Class-likes and functions need to be case-insensitive

[felixfbecker]

FQNs for those nodes should be lowercased
nikic/PHP-Parser#236 (comment)

I wanted to pitch in about this as I've encountered a request for this in my server a while ago. I noticed that composer is not too fond of supporting this in its autoloader, see also [1] and [2]. Because of this, and that varying class names in code is inconsistent and confusing to other programmers, I've decided not to support it for the moment.

To my amazement, I later learned that PHP itself had a trick up its sleeve: some of the class names mentioned in the documentation are not using the same casing as the class that is actually in PHP itself (that you would get if you were to e.g. use Reflection). An example of this is COM, which is called COM according to the documentation but is actually internally reported as being com (sigh). (Of course, this isn't a problem if you do support case insensitivity.)

My two cents ;-).

[1] composer/composer#1803
[2] composer/composer#4209