[robryan]

What was the advantage of case insensitive class and function names? Sounds to me like someone that was implementing very early on without great reasons and them kept for backwards comparability. In all my programming in PHP I have never thought to take advantage of this.

[RobAley]

I'm assuming the original reason is lost in the mists of time, but one advantage it has when calling/using external/3rd party code is in style conventions. If in my code my convention is to use functionNames but in yours you use functionames or FunctionNames, I can still code in my style after include()ing your file. A small advantage, granted.

[meepmorp]

> What was the advantage of case insensitive class and function names?

The programmer can be sloppy/lazy and still have thing turn out largely as expected. If you're just learning how to program, this makes it a bit easier, since a whole class of possible problems goes away.