Pro PHP Refactoring is a book I co-wrote with Francesco Trucchia.
We thought to bridge refactoring ideas towards the PHP community, usually less focused on what matters a lot instead: quality. Covering a broad range of topics, from tool enabling refactoring to each refactoring step description, we also dedicated a few chapters to the improvement of existing legacy application.
On Apress’ website you can buy the book. On this blog you can contact me to let me have your precious feedback. Thank you.