PHP Naming Convention Converter: Convert names between different conventions

This class can convert names between different conventions.

It provides several functions that can take a strings with names with multiple words using certain conventions to separate the words, and converts the strings to use other conventions.

Currently it can convert word separations between:

- camel case to underscores
- underscores to camel case
- underscores to Pascal case
- camel case to separated words
- camel case to upper case first word character
- camel case to upper case first name character