Explore unit testing in PHP with this comprehensive conference talk from PHP UK Conference 2013. Learn how to write effective unit tests using PHPUnit, overcome common challenges, and apply Test-Driven Development (TDD) principles. Discover techniques for handling code dependencies, database interactions, and email functionality in your tests. Gain insights on convincing stakeholders of the long-term benefits of unit testing. Follow along with hands-on examples and practical advice for writing reliable, reusable tests for real-world applications. Access accompanying slides for additional reference and reinforce your understanding of key concepts such as dependency injection, testing private methods, and the CREP index.