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With the design patterns in this book, you'll be able to build PHP applications much more efficiently. Learning PHP Design Patterns shows you how to use patterns through simple examples, and then demonstrates many of them in full-fledged working applications. You'll learn patterns that help you connect PHP and MySQL, as well as several pattern categories that encapsulate object-oriented programming practices and concepts, such as polymorphism. These patterns allow you to adopt a more sophisticated programming style, focusing on language improvements introduced in PHP 5. You'll also learn patterns that help you avoid common programming problems.