Editor’s Note: This is the second in a five-part series on refactoring and modernizing PHP applications.
If you were to identify the most expensive part of any development project, what would that part be? The planning phase? Acquiring copyright or intellectual property? Marketing and advertising? All of these would be wrong. The most expensive part of any software project is the creation of the software itself. It’s the part that requires the most time, energy, and money to do correctly.