In this study, object-oriented programming techniques in PHP and the implementation of the main ideas of software development based on classic design patterns, as well as adherence to development tools and norms, testing, intensive thoroughness, and deploying reliable application code. This sixth edition of the book has been completely updated to comply with PHP 8 Public Language. This paper details the new features of PHP, such as properties and uses in the domain of declaration types. The main goal of the research is to research in PHP some well-established theoretical constructs and basic design patterns. This book is primarily intended for developers who have a solid grasp of PHP programming and who are striving to develop their useful web application development skills by applying development best practices.