Continue to develop elegant and rock-solid systems using PHP. With a focus on mastering essential development tools and applying best practices, Volume 2 of this 7th edition has been fully updated for PHP 8.3, including read only classes, enumerations, typed class constants, as well as various additions to argument and return types. It includes entirely new chapters covering Docker, Vagrant, Ansible, refactoring tools, and PHP on the command line. This book provides a solid grounding in PHP's support for objects, it builds on this foundation to instill core principles of software design and then covers the tools and practices needed to develop, test, and deploy robust code. You'll see how to manage multiple developers and releases with git, create development environments, and deploy Composer leverage thousands of tools and libraries and manage dependencies. You'll also explore strategies for automated testing and continuous integration and examines essential techniques for deploying your code. After reading and using this book, you will have mastered object-oriented enhancements, design patterns, code improvement with PHP_CodeSniffer and PHPStan, and the essential development tools available for PHP 8.3.  What You Will LearnMaster the tools and strategies for testing new code, and techniques for testing legacy projects. Create inline documentation for use by team members, users, and tools such as IDEsDiscover PHP Standards Recommendations and related tools to help you improve your code and build interoperable and reusable componentsWork with Selenium to test Web interfaces. Manage your code and collaborate with your team using Git. Leverage continuous integration to build rock solid systemsWho This Book Is ForAnyone with at least a basic knowledge of PHP who wants to learn about the practices and tools) that can make projects safe, elegant and stable.