Object-Oriented PHP

Where to Go from Here

If you've bought this book and read this far you're obviously interested in OOP. If you know PHP already, then learning OO PHP will not be too difficult. Given the relative simplicity of PHP's object model, certainly less effort is required than for a C programmer to learn C++. Nevertheless, moving to a new language or a new version of a language entails some cost in terms of time and effort, especially if it has an impact on your existing code libraries.

We've covered some of the backward compatibility issues as they relate to OOP. Almost all procedural code will run with no changes under PHP 5. No rewrites are required, and code does not need to be converted to an OO style.

Upgrading existing applications to take advantage ...