Refactoring Legacy PHP
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Home > Computing and Information Technology > Computer programming / software engineering > Refactoring Legacy PHP: A Practical Guide to Modernizing Old Codebases: A Step-By-Step Guide To Refactoring, Testing, & Upgrading Legacy PHP Applications & Codebases With M
Refactoring Legacy PHP: A Practical Guide to Modernizing Old Codebases: A Step-By-Step Guide To Refactoring, Testing, & Upgrading Legacy PHP Applications & Codebases With M

Refactoring Legacy PHP: A Practical Guide to Modernizing Old Codebases: A Step-By-Step Guide To Refactoring, Testing, & Upgrading Legacy PHP Applications & Codebases With M


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About the Book

What You Will Learn in This Book Accurately assess and diagnose legacy PHP codebases: Understand what constitutes "legacy," identify common pitfalls like unmaintained code and its business risks, and set realistic modernization goals. Prepare your development environment for safe refactoring: Master essential practices like version control with Git, establish stable local environments, and employ code archaeology techniques to understand unfamiliar systems. Identify and address various code smells in PHP: Recognize specific anti-patterns such as global state abuse, spaghetti code, duplicated logic, and mixed HTML/PHP, and utilize static analysis tools like PHPStan, Psalm, and PHPMD for automated detection. Implement a robust testing strategy for untestable code: Grasp the non-negotiable role of testing in legacy transformation, overcome challenges in testing tightly coupled code, introduce characterization tests, and set up testing frameworks like PHPUnit. Apply core refactoring techniques incrementally and safely: Execute fundamental refactorings like Extract Method, Extract Class, and Rename, and learn to transition procedural code towards object-oriented structures while safely restructuring data. Write effective tests for existing and refactored PHP code: Gain proficiency in PHPUnit, employ dependency injection and interfaces to make code testable, and utilize mocking and stubbing for isolated unit and integration testing. Leverage design patterns to improve code robustness and flexibility: Understand how to apply creational, structural, and behavioral patterns (e.g., Factory, Adapter, Strategy) to solve common design problems and refactor away anti-patterns. Navigate and execute PHP version upgrades strategically: Comprehend the benefits of modern PHP, understand backward compatibility breaks, and utilize tools like Rector and PHP Compatibility Checker for smoother transitions. Integrate modern PHP features into legacy projects: Implement namespaces and Composer for autoloading, introduce strict types and scalar type declarations, and leverage modern OOP enhancements and improved error handling. Architecturally refactor monolithic PHP applications: Decouple concerns using patterns like MVC, work with legacy databases, introduce API layers, and apply the Strangler Fig pattern for incremental system replacement. Strategically adopt modern PHP frameworks: Evaluate the pros and cons of frameworks like Symfony or Laravel, understand when and how to incrementally integrate them into existing systems. Tackle advanced legacy challenges effectively: Systematically eradicate global state, introduce Composer to projects lacking dependency management, address common security vulnerabilities, and optimize performance. Cultivate a culture of continuous code quality and improvement: Integrate static analysis into CI/CD pipelines, monitor technical debt, balance pragmatism with perfectionism, and plan for the ongoing evolution of your codebase.


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Product Details
  • ISBN-13: 9798289210371
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Height: 279 mm
  • No of Pages: 196
  • Returnable: N
  • Sub Title: A Practical Guide to Modernizing Old Codebases: A Step-By-Step Guide To Refactoring, Testing, & Upgrading Legacy PHP Applications & Codebases With M
  • Width: 216 mm
  • ISBN-10: 828921037X
  • Publisher Date: 22 Jun 2025
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Spine Width: 11 mm
  • Weight: 517 gr


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Refactoring Legacy PHP: A Practical Guide to Modernizing Old Codebases: A Step-By-Step Guide To Refactoring, Testing, & Upgrading Legacy PHP Applications & Codebases With M
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